Knife Piece 1
ItemRepentanceUnlocked
familiarGame ID 626★★★★
How do you unlock Knife Piece 1?
Verified starting unlockSource data confirms that no unlock is required.
Combined with Knife Piece 2, creates a knife familiar that damages enemies and can open the door to the Corpse.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Knife Piece 1 leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13