Main article: Lore
|King Slime||Only a fool could be caught by this pitiful excuse for a hunter.
Unfortunately, our world has no shortage of those.
Favorite this item to gain 5% increased movement speed and 2% increased jump speed.
However, your defense is reduced by 3 due to your gelatinous body.
|The player gains 5% movement speed and 2% jump speed. If they have auto-jump, the jump speed bonus is disabled. However, their defense is reduced by 3.||King Slime|
|The Desert Scourge||The great sea worm appears to have survived the extreme heat and has even adapted to it.
What used to be a majestic beast swimming through the water has now become a dried-up and
gluttonous husk, constantly on a voracious search for its next meal.
Favorite this item for an increase to defense while in the desert or sunken sea.
However, you will deal decreased damage while in these areas due to being a husk of your former self.
|When in the Desert, Underground Desert or Sunken Sea, the player gains 5 defense. However, while in these areas, their damage is reduced by 2.5%.||Desert Scourge|
|The Eye of Cthulhu||That eye...how peculiar.
I sensed it watching you more intensely as you grew stronger.
Favorite this item for night vision at night.
However, your vision is reduced during the day.
|The player is given the Night Owl buff effect at night but the Darkness debuff effect at day.||Eye of Cthulhu|
|Crabulon||A crab and its mushrooms, a love story.
It's interesting how creatures can adapt given certain circumstances.
Favorite this item to gain the Mushy buff while underground or in the mushroom biome.
However, your movement speed will be decreased while in these areas due to you being covered in fungi.
|While in the Underground layer, Cavern layer or a Glowing Mushroom biome, the player will gain the Mushy buff. However, their movement speed is reduced by 10% in these areas.||Crabulon|
|The Crimson||This bloody hell, spawned from a formless mass of flesh that fell from the stars eons ago.
It is now home to many hideous creatures, spawned from the pumping blood and lurching organs deep within.
Favorite this item to prevent perforator cysts from spawning.
|Prevents Perforator Cysts from spawning.||Brain of Cthulhu|
|The Corruption||The rotten and forever-deteriorating landscape of infected life, brought upon by a deadly microbe long ago.
It is rumored that the microbe was created through experimentation by a long-dead race, predating the Terrarians.
Favorite this item to prevent hive cysts from spawning.
|Prevents Hive Cysts from spawning.||Eater of Worlds|
|The Brain of Cthulhu||An eye and now a brain.
Most likely another abomination spawned from this inchoate mass of flesh.
Allows you to teleport similar to the Rod of Discord while in the crimson. Place in your hotbar to use it.
However, you become confused for a few seconds after you use it due to your overwhelming brain power.
|While in The Crimson, it can be used to teleport similar to the Rod of Discord. Using it will inflict the player with Chaos State for 8 seconds and Confused for 2.5 seconds.||Brain of Cthulhu|
|The Eater of Worlds||Perhaps it was just a giant worm infected by the microbe, given centuries to feed and grow its festering body.
Seems likely, given the origins of this place.
Deadly microbes spawn around you while this item is favorited.
However, you will have decreased life regen due to your skin rotting off.
|Spawns Deadly Microbes around the player similarly to the Spore Sac. Microbes deal 20 damage and inflict Cursed Inferno for 1.5 seconds. However, the player's life regeneration will be halved.||Eater of Worlds|
|The Perforators and their Hive||An abomination of comingled flesh, bone, and organ, infested primarily by blood-slurping worms.
The chunks left over from the brain must have been absorbed by the crimson and reconstituted into it.
Favorite this item for all of your projectiles to inflict ichor when in the crimson.
However, enemy spawn rates will be greatly increased while in the crimson due to your body excreting a sweet-smelling pus.
|While in The Crimson, all projectiles will inflict Ichor for 1.5 seconds. However, enemy spawn rates will be increased by 42.86% and maximum spawn count increased by 80% while in The Crimson.||The Perforators|
|The Hive Mind||A hive of clustered microbial-infected flesh.
I do not believe killing it will lessen the corruption here.
Favorite this item for all of your projectiles to inflict cursed flames when in the corruption.
However, enemy spawn rates will be greatly reduced while in the corruption due to your overwhelmingly-putrid odor.
|While in The Corruption, all projectiles will inflict Cursed Inferno for 1.5 seconds. However, enemy spawn rates will be decreased by 23.08% and maximum spawn count decreased by 40% while in The Corruption.||The Hive Mind|
|Queen Bee||As crude as the giant insects are they can prove useful in certain situations...given the ability to control them.
Favorite this item to make small bees and weak hornets friendly.
|Bees and Hornets will deal 0 damage and become friendly. Moss Hornets are not affected by this.||Queen Bee|
|Skeletron||The curse is said to only affect the elderly.
After they are afflicted they become an immortal vessel for an ancient demon of the underworld.
Favorite this item to gain increased damage while in the dungeon.
However, your max health is decreased due to Skeletron's curse.
|While in the Dungeon, the player gains 10% damage and 5% critical strike chance. However, their max health is reduced by 10%.||Skeletron|
|The Slime God||It is a travesty, one of the most threatening biological terrors ever created.
If this creature were allowed to combine every slime on the planet it would become nearly unstoppable.
Favorite this item to become slimed and able to slide around on tiles quickly, at the cost of reduced defense.
This effect does not work with mounts.
|The player will always have the Slimed debuff. The player will also always slide as if they were on Frozen Slime Blocks. However, unlike if they were on Frozen Slime Blocks, they will also slowly decelerate. The player loses 10 defense. The player receives 10% extra movement speed when sliding on blocks.||The Slime God|
|The Underworld||These obsidian and hellstone towers were once home to thousands of...'people'.
Unfortunately for them, they were twisted by their inner demons until they were beyond saving.
Favorite this item to prevent voodoo demons from dropping voodoo dolls.
|Prevents Voodoo Demons from dropping Guide Voodoo Dolls.||Wall of Flesh|
|Wall of Flesh||I see the deed is done.
The unholy amalgamation of flesh and hatred has been defeated.
Prepare to face the terrors that lurk in the light and dark parts of this world.
Favorite this item to gain increased item grab range.
|Increases the default item grab range by 50%.||Wall of Flesh|
|Cryogen||The archmage's prison.
I am unsure if it has grown weaker over the decades of imprisonment.
Favorite this item to gain a frost dash that freezes enemies, at the cost of slightly reduced defense due to your brittle body.
|The player can dash a base distance of 15 blocks, dealing 50 damage and applying Glacial State for 5 seconds to any enemy hit. The player loses 10 defense. The player makes a sound similiar to the Frost armor when hurt.||Cryogen|
|The Mechanical Bosses||I see you have awakened Draedon's old toys.
Once useful tools turned into savage beasts when their AIs went rogue, a mistake that Draedon failed to rectify in time.
|No effect||Any Mechanical Boss|
|The Twins||The bio-mechanical watchers of the night, originally created as security using the souls extracted from human eyes.
These creatures did not belong in this world, it's best to be rid of them.
Favorite this item to gain invisibility and rogue bonuses at night.
However, your defense is reduced while above 50% life due to you feeling softer.
Your max acceleration is reduced while below 50% life due to you feeling heavier.
|At night, the player will gain the effects of an Invisibility Potion, along with 5% increased rogue damage and critical strike chance. If their health is above 50%, their defense is reduced by 10. Otherwise, their max acceleration is reduced by 5%.||The Twins|
|Brimstone Crag||Ah...this place.
The scent of broken promises, pain, and eventual death is heavy in the air...
|No effect||Brimstone Elemental|
|Brimstone Elemental||The most powerful of the elementals, bent on exacting revenge upon the bloody inferno that demolished her home.
Finally put to rest, she will suffer no longer from the grief caused by the deaths of her people.
Favorite this item to improve the inferno potion effect.
|Along with the normal Inferno Potion effect, nearby enemies will be inflicted with Brimstone Flames for 2 seconds and take 50 damage at double the Inferno Potion's normal tick rate.||Brimstone Elemental|
|The Destroyer||A machine brought to life by the mighty souls of warriors, and built to excavate massive tunnels in planets to gather resources.
Could have proven useful if Draedon didn't have an obsession with turning everything into a tool of destruction.
Favorite this item to gain a boost to your pick speed.
However, your max acceleration is decreased slightly due to you feeling heavier.
|The player gains 5% mining speed. However, their max acceleration is reduced by 5%.||The Destroyer|
|Aquatic Scourge||A horror born of pollution and insatiable hunger; based on size alone this was merely a juvenile.
These scourge creatures are the largest aquatic predators and very rarely do they frequent such shallow waters.
Favorite this item to gain immunity to the sulphurous waters and increase the stat gains from the Well Fed buff.
However, without the Well Fed buff your stats will decrease due to your insatiable hunger.
|The Sulphurous Sea no longer deals damage to the player or reduces their life regen. The player gains an increase and decrease to the following stats while having and not having the Well Fed buff respectively: 1% critical strike chance, 2.5% damage, 1 defense, 2.5% melee speed, 25% minion knockback and 10% movement speed.||Aquatic Scourge|
|Sulphur Sea||I remember the serene waves and the clear breeze.
The bitterness of my youth has long since subsided, but it is far too late. I must never repeat a mistake like this again.
|No effect||Aquatic Scourge|
|Skeletron Prime||What a silly and pointless contraption for something created with the essence of pure terror.
Draedon obviously took several liberties with its design...I am not impressed.
Favorite this item to gain a boost to your armor penetration.
However, your max acceleration is decreased due to you feeling heavier.
|The player gains 5 armor penetration. However, their max acceleration is reduced by 5%.||Skeletron Prime|
|Calamitas Clone||You are indeed stronger than I thought.
Though the bloody inferno still lingers, observing your progress.
Favorite this item to gain a boost to your minion slots but at the cost of reduced max health.
|The player's max life is reduced by 25%, but they gain an extra 2 minion slots.||Calamitas|
|Plantera||Well done, you killed a plant.
It was used as a vessel to house the spirits of those unfortunate enough to find their way down here.
I wish you luck in dealing with the fallout.
Favorite this item to gain increased item grab range.
|Increases the default item grab range by 100%.||Plantera|
|The Ocean||Take care to not disturb the deep waters of this world.
You may awaken something more terrifying than death itself.
Favorite this item to prevent the mysterious water elemental from spawning.
|Prevents ??? from spawning.||Leviathan and Anahita|
|Leviathan and Anahita||An odd pair of creatures; one seeking companionship and the other seeking sustenance.
Perhaps two genetic misfits outcast from their homes that found comfort in assisting one another.
Favorite this item to gain increased max health while wearing the aquatic heart and treasure detect while wearing the strange orb.
Allows the young Ocean Spirit light pet to move normally while outside of liquids.
However, if you're not submerged in liquid you will have decreased defense and damage reduction.
|When the Aquatic Heart is equipped, the player gains an extra 5% max health. When the Strange Orb is equipped, the player is granted the effects of a Spelunker Potion and the ocean spirit will function normally outside of liquids. However, while not submerged, their defense is reduced by 8 and their damage reduction is reduced by 5%.||Leviathan and Anahita|
|Astrum Aureus||A titanic cyborg infected by a star-borne disease expelled from the belly of an ancient god.
The destruction of this creature will not prevent the spread of the disease.
Favorite this item to gain 10% increased jump speed in space.
|When in Space, the player gains 10% jump speed.||Astrum Aureus|
|Golem||A primitive construct.
I admire the lihzahrd race for their ingenuity, though finding faith in such a flawed idol would invariably lead to their downfall.
Favorite this item to gain increased defense while standing still.
|When standing still, the player gains 10 defense.||Golem|
|The Plaguebringer Goliath||A horrific amalgam of steel, flesh, and infection, capable of destroying an entire civilization in just one onslaught.
Its plague nuke barrage can leave an entire area uninhabitable for months. A shame that it came to this but the plague must be contained.
Favorite this item to gain increased wing flight time, but at the cost of reduced life regen.
|The player's wing time is increased by 25%, but their life regen is cut in half. This does not boost flight time if the Defiled Rune is active.||Plaguebringer Goliath|
|Duke Fishron||The mutant terror of the sea was once the trusted companion of an old king; he tamed it using its favorite treat.
Long ago, the creature flew in desperation from the raging bloody inferno consuming its home, ultimately finding its way to the ocean.
Favorite this item for an increase to all damage, crit and movement speed while submerged in liquid.
However, while not submerged in liquid you will have slightly decreased damage, crit and movement speed due to feeling dried out.
|When submerged, the player gains 15% movement speed and 5% damage and critical strike chance. However, while not submerged, their damage is reduced by 1%, crit chance is reduced by 2% and movement speed is reduced by 4%.||Duke Fishron|
|Ravager||The flesh golem constructed using twisted necromancy during the time of my conquest to counter my unstoppable forces.
Its creators were slaughtered by it moments after its conception. It is for the best that it has been destroyed.
Favorite this item to gain an increase to all damage, but at the cost of reduced wing flight time.
|The player gains 10% damage, but their wing time is cut in half.||Ravager|
|Lunatic Cultist||The gifted one that terminated my grand summoning so long ago with his uncanny powers over the arcane.
Someone I once held in such contempt for his actions is now...deceased, his sealing ritual undone...prepare for the end.
Your impending doom approaches...
Favorite this item for an increase to all stats during the lunar event.
However, your vision is decreased due to eldritch knowledge damaging your mind.
|During the Lunar Events the player gains 4% damage reduction, 4 defense, 4% damage and critical strike chance, 50% minion knockback and 10% movement speed. However, they are inflicted with a permanent Darkness debuff.||Lunatic Cultist|
|The Red Moon||We long ago feared the light of the red moon.
Many went mad, others died, but a scant few became blessed with a wealth of cosmic understanding.
|No effect||Lunatic Cultist during a Blood Moon|
|Astral Infection||This twisted dreamscape, surrounded by unnatural pillars under a dark and hazy sky.
Natural law has been upturned. What will you make of it?
|No effect||Astrum Deus|
|Astrum Deus||God of the stars and largest vessel for the Astral Infection.
Though struck down from its place among the stars its remnants have gathered strength, aiming to take its rightful place in the cosmos once more.
Favorite this item to gain increased movement speed in space.
|When in Space, the player gains 20% movement speed.||Astrum Deus|
|Moon Lord||What a waste.
Had it been fully restored it would have been a force to behold, but what you fought was an empty shell.
However, that doesn't diminish the immense potential locked within it, released upon its death.
Favorite this item to gain an improved Gravity Globe that gives you an increase to all stats while upside down.
However, while not upside down you have permanent featherfall.
|When the player has the Gravity Globe equipped and has flipped gravity, the player gains 5% damage reduction, 10 defense, 10% damage and critical strike chance, 150% minion knockback and 15% movement speed. However, while not upside down they get permanent Featherfall effect.||Moon Lord|
|The Profaned Guardians||The ever-rejuvenating guardians of the profaned flame.
Much like a phoenix from the ashes their deaths are simply a part of their life cycle.
Many times my forces have had to destroy these beings in search of the Profaned Goddess.
|No effect||Profaned Guardians|
|The Dragonfolly||A failure of twisted scientific ambition; it appears our faulted arrogance over life has shown once more in the results.
Originally intended to be a clone of the Jungle Dragon, these were left to roam about the jungle, attacking anything in their path.
|No effect||The Dragonfolly|
|Providence, the Profaned Goddess||A core surrounded by stone and flame, a simple origin and a simple goal.
What would have become of us had she not been defeated is a frightening concept to consider.
Favorite this item to imbue all projectiles with profaned flames, causing them to inflict extra damage.
However, your max life is decreased due to a part of your soul being required to fuel the profaned flames.
|All non-classless projectiles are granted a 10% multiplicative damage boost. All projectiles inflict Holy Flames for 7 seconds. However, the player's max life is reduced by 20%.||Providence, the Profaned Goddess|
|The Sentinels of the Devourer||Signus. The Void. The Weaver.
Each represent one of the Devourer’s largest spheres of influence.
Dispatching them has most likely invoked its anger and marked you as a target for destruction.
|No effect||Any Sentinel of the Devourer|
|Polterghast||A creature born of hatred and anger, formed by countless human souls with all of their energy entirely devoted to consuming others.
It seems a waste to have had such a potent source of power ravage mindlessly through these empty halls.
Favorite this item to gain increased item grab range.
|Increases the default item grab range by 150%.||Polterghast|
|Old Duke||Strange, to find out the mutant terror of the seas was not alone in its unique biology.
Perhaps I was mistaken to classify the creature from its relation to pigrons alone.
Favorite this item to convert negative effects from the Acid Rain debuff to positive effects.
|While the player is inflicted with Irradiated, their defense and damage reduction is increased by 10 and 5% instead of being decreased by 10 and 10% respectively.||The Old Duke|
|The Devourer of Gods||This serpent’s power to assimilate the abilities and energy of those it consumed is unique in almost all the known cosmos, save for its lesser brethren.
I would have soon had to eliminate it as a threat had it been given more time and creatures to feast upon.
Favorite this item to boost the power of your true melee strikes by 25%.
However, due to your reckless nature you will take 5% increased damage.
|True melee damage is increased by 25%. However, the player's damage taken is multiplied by 1.05.||The Devourer of Gods|
|Jungle Dragon, Yharon||I would not be able to bear a world without my faithful companion by my side.
Fortunately, fate will have it so that it is a world I shall never have to see, for better or for worse.
Favorite this item to gain nearly-infinite wing flight time, but at the cost of a 25% decrease to all damage.
|The player's wing time is increased to around 14 minutes but their damage is decreased by 25%. This does not occur if Defiled Rune is active.||Jungle Dragon, Yharon|
|Calamitas||The witch unrivaled. Perhaps the only one amongst my cohorts to have ever given me cause for doubt.
Now that you have defeated her your destiny is clear.
Come now, face me.
Favorite this item to die instantly from every hit.
|Causes the player to die in one hit. The message "Go to hell." will be displayed if the player dies this way.||Supreme Calamitas|