Cosmic Rainbow

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Cosmic Rainbow
  • Cosmic Rainbow.png
Stack digit 1.png
TypeWeaponCrafting material
Damage105 Magic
Knockback0 (No Knockback)
Mana cost30
Critical chance4%
Use time35 Very Slow
TooltipLaunches a barrage of rainbows
RarityRarity Level: 9
Sell 16 Gold Coin.png
Research1 required
Projectile created
Rainbow (projectile)
If you were looking for something other than the magic weapon, see Cosmic (disambiguation).

The Cosmic Rainbow is a craftable Hardmode magic weapon. When fired, it spawns 3 rainbows in the direction of the cursor in a similar manner as an arrow flying out of a bow. Additionally, 2 more rainbows fall from the sky at random locations within the vicinity of the cursor. These rainbows deal constant damage to any entity that collides with them.

Its best modifier is Mythical. However, the weapon's knockback will not be affected due to already being 0.



Used in


  • Despite having the appearance of a bow, the weapon uses mana and deals magic damage.


  • Although this is a magic weapon, it essentially behaves like a Sentry due to the long lasting effect. This allows all classes to use it to increase their DPS.


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
  • Now uses 5 Galactica Singularities in its recipe instead of 5 Meld Constructs, 5 Life Alloys, and a Core of Calamity.
  • Decreased sell price from 19 Gold Coin to 16 Gold Coin.
  • Now uses Pearlwood Bow in its recipe.
  • Rainbows now grant 10 local immunity frames.
    • Reworked, now fires 3 rainbows towards the cursor, with 2 more rainbows falling from the sky instead of firing 7-10 rainbows in random directions.
    • Changed its tooltip.
    • Now uses the Rarity Level: 9 rarity instead of Rarity Level: 10.
    • No longer has any knockback.
    • Now uses 5 Meldiate Bars in its recipe instead of 10.
    • Now requires an Ancient Manipulator to craft instead of a Hardmode Anvil.