Binding of Isaac: Rebirth Wiki
Binding of Isaac: Rebirth Wiki

Added in Afterbirth †

Upon getting three items or pills that increase Isaac's size, he will create dust clouds when walking and have a chance to spawn rock waves around him upon taking damage.

Added in Repentance Isaac can also crush rocks and other destructible obstacles by walking over them. Touching spiked rocks sometimes doesn't deal damage, depending on Isaac's size, speed and angle they're touched from.

Passive Collectibles[]

Name ID Icon Quote Description Added in Repentance Quality
Leo 5.100.302 Leo Stompy Isaac can destroy rocks by walking into them. 1
Magic Mushroom 5.100.12 Magic Mushroom All stats up! Makes Isaac bigger. Adds one Red Heart container, +0.3 damage, x1.5 damage multiplier, +5.25 range, and +0.3 speed. Restores all health on pickup. 4



  • Picking up items that decrease size do not count against progress for this transformation.
  • This transformation makes it more difficult to effectively use blood donation machines and Devil beggars, as the rock waves will destroy them.
    • Added in Repentance The rock waves will no longer destroy them.


  • This transformation and Adult are the only transformations that pills count towards.
  • This is the only transformation that doesn't add to Isaac's costume, and instead only changes his size and adds dust trails when he walks, as if kicking up dirt by stomping.