Gives one Soul Heart. For the current room; +0.7 damage, -0.18 speed, Isaac breaks rocks and deals contact damage. Gives half a Black Heart. For the current room; +2 damage, -0.18 speed, Isaac breaks rocks and deals contact damage.
Tears are replaced with a blood laser beam that pierces through all enemies and obstacles in its path and deals high damage. Can only be fired after a short charge-up period.
Sanguine Bond's spikes have a 2% chance to transform Isaac into Leviathan.
Gallery[]
Concept art for Leviathan along with other transformations that would be implemented into the Afterbirth DLC, by Edmund McMillen. Note that "Sistanis" is an early name of this transformation concept.