Eternal's Revenge is a transformation in Kicks and Giggles, a mod for The Binding of Isaac.
Simply refered to as "Eternal" in-game.
Isaac is tinted white rather than gaining a special costume for this transformation.
Gain 6 or more heart containers with Eternal Hearts to achieve this.
X1.3 Damage Mult.
Gains flight.
Blue flies now spawn damaging beams of light on contact.