#5.100.569 ยท Passive Item

Blood Oath

"Bleed me dry"

  • Spawns a familiar that stabs Isaac at the beginning of each floor, draining all but half a heart of his red heart containers (or all of them if Isaac has at least one soul/bone heart).
  • Gives Isaac +(0.15 * HeartsLost ^ 2) damage and +(0.05 * HeartsLost) speed for the rest of the floor, where HeartsLost is the total half-hearts of damage taken from Blood Oath.
  • This amounts to a max of +19.8 damage and +0.6 speed.

Found in

  • Curse Room
  • Devil Room