Binding of Isaac: Rebirth Wiki

Leo is a passive Zodiac item.


  • Isaac can break obstacles by walking into them.
  • Increases Isaac's size.
  • Added in Afterbirth † This item belongs to the Stompy set. Collecting three items from this set will transform Isaac into Stompy.


  • Walking into Bomb Rocks will cause them to explode.
  • Mushrooms may hurt Isaac with a poison cloud if walked into.
  • Polyps may hurt Isaac with blood shots or red creep if walked into.
  • Flight does not prevent the effect from occurring.
  • Holes in the ground can be filled if Isaac walks into adjacent rocks from the right direction, similar to bombs.
  • TNT Barrels will not be destroyed or explode on contact, however Movable TNT Barrels will explode and may deal damage to Isaac if walked into.
  • Allows Isaac to walk over and destroy Red Poop without taking damage. Isaac will still take damage if he is standing on it when it reforms.
  • Walking into an Angel Statue in the Angel Room will trigger the boss fight, and Isaac will take damage as the Angel spawns on top of him.
  • Removed in Afterbirth † Nullifies effects of One Makes You Small pills, One Makes You Larger pills, and other items which decrease size, such as Caffeine Pill Caffeine Pill and Binky Binky.
  • Added in Repentance Spiked Rocks can be destroyed, but depending on Isaac's size, angle and velocity they may still hurt him.

In-game Footage[]


  • Despite increasing size, Leo does not contribute towards the Added in Afterbirth †Huge Growth Huge Growth unlock.


PC VEAG MPL4 (Treasure Room adjacent to spawn)

PC KMKY HZCD (Treasure Room adjacent to spawn)

PC Added in Repentance BQZN YL1D (Treasure Room adjacent to spawn)

PC Added in Repentance V6J9 1JB1 (First floor Treasure room)

PS4 G9TB CLTG (First floor Treasure Room)

Vita L8LK WE14 (First floor Treasure Room)