Refraction Rotor

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Refraction Rotor
  • Refraction Rotor.png
Stack digit 1.png
Damage616 Rogue
Knockback8.5 (Very Strong)
Critical chance4%
Use time18 Average
TooltipFires a huge prismatic disk shuriken
The shuriken shatters moments after impact into homing rockets
Stealth strikes shatter into many more rockets
RarityRarity Level: 15
Sell 48 Gold Coin.png
Research1 required
Projectile created
Prism Rocket
Prism Rocket
Dropped by
Exo Mechs (Thanatos)
XB-∞ Hekate (Spine)

The Refraction Rotor is a post-Moon Lord rogue weapon that is dropped by the Exo Mechs after XM-05 Thanatos has been defeated last. When used, it throws a gravity-defying disk that passes through tiles and pierces nine times. When destroyed, the disk shatters into 6 homing rockets which each deal 49.5% damage, along with 6 gravity-affected metallic gore chunks which do not deal damage.

Performing a stealth strike with the Refraction Rotor will cause the resulting disk to burst into more rockets instead of gore chunks. The rockets replacing the gore will travel faster than normal and deal 60% damage. The main disk will deal 75% damage and the main rockets will deal 37.125% damage.

Its best modifier is Flawless.


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
    • Rockets now home towards the closest enemy instead of the earliest enemy in the NPC array.
    • Increased sell price from 30 Gold Coin to 48 Gold Coin.
    • Nerfed use time from 17 to 18.
    • Fixed it being able to execute infinite stealth strikes under specific attack speed conditions.
  • Prism rockets no longer grant 9 local immunity frames.