Rubico Prime

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Cosmic Plushie.png
Cosmic Plushie.png
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This item is dedicated to: OnyxInc
Rubico Prime
  • Rubico Prime.png
Stack digit 1.png
Damage1050 Ranged
Knockback10 (Extremely Strong)
Critical chance44%
Use time300 Snail
TooltipSemi-automatic sniper that fires in 5 second bursts
Fires impact rounds that have an increased crit multiplier
RarityRarity Level: 14
Sell 40 Gold Coin.png
Research1 required

The Rubico Prime is a craftable post-Moon Lord gun that is a direct upgrade to the Pestilent Defiler. When used, a high-velocity round is fired every half-second for a total of 10 times. The bullets pierce all tiles and enemies, dealing 25% more damage during a critical strike.

Its best modifier is Unreal.



Crafting Station
Cosmic AnvilCosmic Anvil
Pestilent DefilerPestilent Defiler1
Cosmilite BarCosmilite Bar8
Nightmare FuelNightmare Fuel20
Rubico PrimeRubico Prime1


  • The weapon itself is a reference to the Rubico Prime from the video game Warframe.
  • While the weapon really fires once every half-second, it has a use time of 300, making it the slowest use time weapon in the Calamity Mod, alongside the Ice Barrage.


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
  • Increased sell price from 28 Gold Coin to 40 Gold Coin.
  • Fixed it dealing less damage on critical strikes.
  • No longer does more damage to inorganic enemies.
  • Now requires a Cosmic Anvil to craft instead of a Draedon's Forge.
  • Fixed a bug that caused sound effect to not play correctly when using it in conjunction with Elemental Quiver.