Ark of the Cosmos

Ark of the Cosmos

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Statistics

Type	Weapon
Damage	501 Melee
Knockback	9.5 (Extremely Strong)
Critical chance	19%
Use time	14 Very Fast
Velocity	28
Tooltip	Fires different homing projectiles based on what biome you're in Upon hitting an enemy you are granted a buff based on what biome you're in Projectiles also change based on moon events
Rarity
Sell	50

Projectiles created

Eon Beams

Galaxian Star

The Ark of the Cosmos being used against a Target Dummy and a more distant Super Dummy.

The Ark of the Cosmos is a craftable post-Moon Lord broadsword that autoswings. It is the final upgrade of the Ark of the Ancients and Biome Blade. It fires an Eon Beam of random colors when swung, including pink, green, blue, and orange. These beams can pierce twice and ignore tiles, inflicting the Elemental Mix debuff on hit. Each beam color also has varying immunity frames on hit, with pink at a highest value of 6 and decreasing in the mentioned order to orange's value of 3.

A column of four Galaxian Stars are also fired inaccurately towards the cursor, which are capable of piercing once, ignoring tiles, and strongly homing into enemies. On hit, stars spawn an additional projectile depending on the biome the player is in. Certain biomes will also debuff the target for 20 seconds alongside spawning a projectile.

Upon hitting any enemy with the blade itself or any of the homing stars, the player will be given a certain buff depending on biomes. Additionally, the player will gain additional buffs along with the biome effects during certain moon events. Both of the buffs provided last 10 seconds.

Its best modifier is Legendary.

Buffs and Effects

Moon Event	Player Buff
Blood Moon	Battle
Frost Moon	Rapid Healing
Pumpkin Moon	Well Fed

Only one biome effect can be applied at a time. The following is a list of biome effects from highest to lowest priority.

Biome / Event	Enemy Debuff	Player Buff	Projectile Spawned
Astral Infection	Astral Infection	Gravity Normalizer	Astral Star
Jungle	Plague	Thorns	Crystal Leaf
Snow / Ice	Glacial State	Warmth	Ice Bolt
Ocean Sulphurous Sea	Crush Depth	Wet	Flairon Bubble
The Corruption	n/a	Wrath	Cursed Flame
The Crimson	n/a	Rage	Golden Shower
Dungeon	Frostburn	Dangersense	Water Bolt
Desert	Holy Flames	Endurance	Onyx Blast
Glowing Mushroom	Temporal Sadness	Spelunker	Glowing Mushroom
The Underworld	Brimstone Flames	Inferno	Ball of Fire
The Hallow	Holy Flames	Heartreach	Rainbow Explosion
Nebula Pillar	n/a	Magic Power	Nebula Blast
Stardust Pillar	n/a	Summoning	Stardust Cell Shot
Solar Pillar	n/a	Titan	Solar Explosion
Vortex Pillar	n/a	Ammo Reservation	Vortex Rocket
None of the above	Armor Crunch	Dryad's Blessing	Terrarian Orb

Crafting

For a full crafting tree, see here.

Recipe

Crafting Station
Draedon's Forge
Ingredient(s)		Amount
	Ark of the Elements	1
	Galaxia	1
	Auric Tesla Bar	4
Result
	Ark of the Cosmos	1

Notes

• If the player travels into a different biome after a projectile is fired, the projectile's effect will change to the new biome.
• The Ocean and Underworld biomes are determined by the player's position and depth.
  • Biomes such as the Abyss or the Brimstone Crag will not count as the Ocean or Underworld respectively if they do not meet the position requirements.
    • As most of the Abyss takes place below the Surface layer, it often counts as none of the biomes.
• Certain projectiles fired from Galaxian Stars are modified:
  • All projectiles fired will have the melee damage type.
  • Rainbow Explosion and Vortex Rocket's immunity frames are modified to use usesLocalNPCImmunity with a hit cooldown value of -1.
  • Cursed Flame, Golden Shower, Water Bolt, Stardust Cell Shot, and Terrarian Orb have their pierce reduced to none.

Tips

• Ark of the Cosmos is useful against enemies who have high mobility or keep a safe distance away from the player as it shoots lots of high-damage, homing projectiles.

Trivia

• The base damage of the Ark of the Cosmos is the sum of the base damages of the Galaxia and Ark of the Elements.