Guide:Calamitas strategies

Calamitas is a Hardmode boss that is usually fought after defeating all Mechanical Bosses alongside Cryogen, the Brimstone Elemental, and the Aquatic Scourge. Additionally, Calamitas receives a buff after defeating Providence, the Profaned Goddess and begins to drop Bloodstone. Calamitas can be spawned by using an Eye of Desolation on the Surface at night.

This guide will mention items exclusive to Expert and Revengeance Mode with no special formatting and will follow the intended progression.

Terrain Preparation
Calamitas requires a lot of room. Two to three long sets of platforms should be spaced out roughly 20 blocks apart. Having platforms above the ground will help as it will prevent you from running into Catastrophe's bouncing fireballs later in the fight. In the case that you end up needing to go near the ground, the ground of the arena should be leveled to prevent crevices and holes obstructing your movement.

Strong vertical mobility is a great asset for this fight as well as good horizontal mobility. As such, it would not be a bad idea to invest in some Weightless Candles. Additionally, placing Campfires and Heart Lanterns can help with recovery from hits.

Armor

 * Titanium armor is an all-around good option for Melee, Ranged, and Mages due to its high survivability from Shadow Dodge.
 * Chlorophyte armor can also be utilized for extra damage.
 * Spider armor is generally preferred for Summoners due to the high damage bonuses for minions.
 * Daedalus armor is another well-rounded armor set for all classes.

Accessories

 * Flame Wings and Frozen Wings are the best wings available to the player at this point and should be prioritized.
 * Bat Wings are also a viable option, as its nighttime boosts are powerful.
 * A Frog Leg, Aero Stone, or Grand Gelatin can be utilized with wings to give an extra boost to movement speed.
 * The MOAB is another alternative set of wings but is generally more difficult to use effectively.
 * Angel Treads are a necessity for keeping up with Calamitas’ speed.
 * The Evasion Scarf and the Shield of Cthulhu can be used to make quick dashes to escape deadly situations.
 * The Crown Jewel can be used to help reduce the effects of Brimstone Flames and Abyssal Flames.
 * Alternatively, the Abaddon reduces the damage over time of the Brimstone Flames debuff by 50% whereas the Margarita drink halves the duration of both at the cost of some defense and life regeneration.
 * The Deific Amulet is a strong option providing armor penetration, increased immunity frames, and reduced potion cooldown.
 * Melee players should use the Mechanical Glove and the Bloody Worm Scarf for their strong melee boosts and the latter's increased damage reduction.
 * If the player is utilizing Yoyos, then the Yoyo Bag should be prioritized.
 * Ranged players should use the Ranger Emblem and Magic Quiver to help boost damage output.
 * Magic players should use the Mana Flower and the Celestial Cuffs to quickly recover mana.
 * Summoners should use the Hallowed Rune for the stat boosts it provides alongside secondary damage with its stars.
 * Rogue users will find the Rogue Emblem and the Raider's Talisman useful to boost their damage output.

Melee

 * The Pwnagehammer is a strong option that deals excellent damage although it suffers against the Soul Seekers.
 * The Ark of the Ancients is a good weapon to carpet-bomb the Soul Seekers but struggles otherwise.
 * The Kelvin Catalyst can decimate Calamitas, as well as dealing massive damage to both the Soul Seekers and the brothers.
 * The Celestial Claymore is great at dealing damage to the brothers when they are dashing.

Ranged

 * The Sea's Searing (Legendary weapon) is a powerful option that can deal massive damage, but it is hard to get due to drop chance.
 * The Chlorophyte Shotbow with Ichor Arrows is an effective choice due to the Ichor debuff and the bow's high damage output.
 * The Megashark with Crystal Bullets is an effective choice with ammo conservation and high damage output.
 * The Corroded Caustibow can deal massive damage with Ichor Arrows.

Mage

 * The Brimrose Staff is a great all-around weapon that can deal with both Calamitas and her brothers.
 * The SHPC proves excellent throughout the entire fight.
 * The Miasma has a wide area of damage that provides consistent DPS throughout the fight.
 * The Ion Blaster is a very powerful choice throughout the whole fight due to its high fire rate and damage, but be aware its damage will decrease as your mana decreases.
 * The Infernal Rift has good direct damage.
 * The Relic of Ruin is a good weapon for dealing with the brothers, although it can be hard to use at long range.
 * The Valkyrie Ray is an excellent option against the Soul Seekers and the second brothers phase.
 * The Golden Shower is an excellent support option that inflicts the Ichor debuff.

Summoner

 * The Dormant Brimseeker or the Igneous Exaltation are the best minions for Calamitas.
 * The Black Hawk Remote can also do amazing damage against Calamitas because of its targeting system, however it doesn't do well against the brothers.
 * The Tundra Flame Blossoms Staff or the Sun God Staff can be good extra sources of damage when used alongside the aforementioned minions.
 * The Cryogenic Staff summons a powerful sentry that provides important aid.
 * The Shellfish Staff is extremely useful when dealing with Calamitas' brothers due to its ability to latch on to enemies.
 * The Ballista Cane is an alternative that can be spammed through constant recasting.

Rogue

 * The Brimblade is extremely effective against Calamitas especially when the blades stack together. They can decimate Calamitas, her minions and her brothers.
 * The Terror Talons are also a good option, especially when the player is far enough away from Calamitas or her brothers that the projectiles consistently hit them.
 * The Kelvin Catalyst can decimate Calamitas, however, the weapon is obtainable only in Revengeance Mode, making the Brimblade more preferable on lower difficulties.
 * The Pwnagehammer is a strong option that deals excellent damage, although it suffers against the Soul Seekers.
 * The Spear of Destiny (RIV) is an extremely powerful homing option that can deal massive damage throughout the entire fight, however it may be difficult to obtain due to its rarity.

Classless

 * A Lunic Eye and a Golden Gun can make the fight easier to bear due to their powerful debuffs.

Miscellaneous

 * The Well Fed buff provides a useful all around stat boost.

Armor

 * Tarragon armor is the preferred choice for all classes.
 * However, Lunar armors will work just as well.
 * Solar Flare armor for Melee
 * Vortex armor for Ranged
 * Nebula armor for Mage
 * Stardust armor for Summoner
 * Empyrean armor for Rogue

Accessories

 * Tarragon Wings (with Angel Treads) or Seraph Tracers are the preferred wings.
 * Lunar Wings do not perform as well as Tarragon Wings, but they are easier to obtain.
 * Asgard's Valor, Statis' Ninja Belt, or the Elysian Aegis all provide a dash and allow the player to make sharp turns and are very useful.
 * Asgard's Valor and the Elysian Aegis additionally give knockback immunity and many defensive boosts.
 * Statis' Ninja Belt additionally provides the chance of a ninja dodge along with increased jump acceleration.
 * The Absorber is important for survivability by increasing damage reduction as well as giving increased jump acceleration.
 * The Community is a great all-around accessory that boosts offensive and defensive stats as well as boosting flight time.
 * The Heart of the Elements provides many all-around boosts including damage, damage reduction, life regen, and jump acceleration.
 * Melee players should use the Fire Gauntlet and Celestial Shell for its strong melee boosts as well as increased damage reduction.
 * Ranged players should use the Dynamo Stem Cells or Artemis Emblem, which both help in boosting damage output.
 * The Artemis Emblem additionally gives some life regen and ammo conservation.
 * Magic players should use the Sigil of Calamitas for its strong magic boosts.
 * Summoners can boost their minion count and damage with the Star-Tainted Generator, Statis' Curse and the Profaned Soul Artifact.
 * Rogue users will find the Dark God's Sheath, Moonstone Crown, and Vampiric Talisman useful to boost their damage output.

Weapons
The weapons made from Uelibloom Bars and drops from Providence are typically the best options for the fight.

Melee

 * The Omega Biome Blade is an excellent option with homing and high single target damage.
 * The Solar Flare or Verdant provide good DPS against Calamitas at the cost of lesser range.
 * The Lifehunt Scythe is a good option that leaves projectiles in the path of the brothers as well as some healing, should any minions get too close.

Ranged

 * The Blissful Bombardier can deal solid damage and homes as well.
 * The Nettlevine Greatbow with Luminite Arrows is a solid pick with piercing and high damage output.
 * The Onyx Chain Blaster is an excellent option that deals high damage when landing the onyx blasts.

Mage

 * Although DPS is lower, Nuclear Fury is a homing option allowing the player to focus on dodging.
 * The Purge Guzzler is a good choice with its spread effect allowing it to deal with both Calamitas and her minions.
 * The Plasma Rifle's primary fire provides a powerful area of effect that can easily deal with Calamitas' brothers and the soul seekers.
 * The Ultra Liquidator is an excellent secondary weapon for applying Ichor for long periods of time.
 * The Genisis can deal great damage to Calamitas, her brothers, and the soul seekers due to its piercing capability and high rate of fire.

Summoner

 * Dazzling Stabber Staff is a great option when dealing with both Calamitas and her brothers.
 * The Energy Staff provides additional DPS to aid your minions.

Rogue

 * The Elemental Disk or the Molten Amputator provide good DPS at the cost of range.
 * The Shattered Sun provides homing and more range at the cost of DPS.

Miscellaneous

 * The player may wish to use weapons such as the Marked Magnum or Golden Gun to inflict debuffs. In addition, despite being a mage weapon, the Everglade Spray can be used to inflict 2 debuffs and also pierce; making it useful against the brothers.

Phase 1
The start of the fight is very basic. Calamitas behaves very similarly to Retinazer's second phase. However, instead of Retinazer's red lasers, Calamitas fires brimstone lasers that split and home after a short distance. Either a u-shaped pattern or circling around Calamitas is typically enough to avoid the lasers.

Phase 2
Once Calamitas reaches 75 percent health, she will transition to Phase 2, indicated with a status message and a new health bar. She will continue to act the same but will fire hellfire blasts instead of brimstone lasers when flying above the player. You should continue a u-shaped pattern or circling to avoid her new attacks. Once she summons her brothers, you should begin circling Calamitas if you have not already. If you have trouble flying over Calamitas, consider utilizing jump boosts from items such as the Aero Stone or Bounding Potion.

At 70 percent health, Calamitas will summon Cataclysm. Cataclysm rotates between breathing a brimstone flamethrower and charging at the player. At 50 percent health, Calamitas will summon five Soul Seekers that rotate around her, periodically firing brimstone darts and summoning Life Seekers. At 40 percent health, Calamitas will summon Catastrophe. Catastrophe rotates between firing bouncing brimstone fireballs and charging at the player. At 10 percent health, Calamitas will summon both Cataclysm and Catastrophe. In Expert Mode+, Calamitas will take almost no damage while either Cataclysm or Catastrophe are alive.

General Tips

 * The Rod of Discord (or the Normality Relocator for the Post-Providence fight) is a very useful tool as it allows instantaneous teleporting to avoid the brothers.