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Item icon
Item altar
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Item ID
Character Appearance
Character appearance
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Collection Grid
Added in Afterbirth / Removed in Repentance(page 3, column 17, row 3)
Removed in Afterbirth(page 3, column 7, row 10)
Added in Repentance(page 3, column 18, row 3)

Leo is a passive Zodiac item.

Effects[edit | edit source]

  • 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.

Notes[edit | edit source]

  • 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.
  • 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 15►Caffeine Pill Caffeine Pill and Added in Afterbirth15►Binky Binky.

In-game Footage[edit | edit source]

Trivia[edit | edit source]

  • Despite increasing size, Leo does not contribute towards the Huge Growth unlock.

Seeds[edit | edit source]

PC VEAG MPL4 (Treasure Room adjacent to spawn)

PC KMKY HZCD (Treasure Room adjacent to spawn)

PS4 G9TB CLTG (First floor Treasure Room)

Vita L8LK WE14 (First floor Treasure Room)

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