Knife Piece 2 - The Binding of Isaac

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Knife Piece 2 is a familiar in The Binding of Isaac, added in the Repentance DLC.

Can be acquired from the Mother chase scene in Mines/Ashpit II.

Spawns a knife blade familiar that follows Isaac.

When combined with the other piece, it forms a knife familiar that launches itself in the direction Isaac is shooting, dealing 25 damage to and piercing enemies it hits.

Can be launched at the red door at the end of Mausoleum/Gehenna to open the door leading to the Mother path, destroying the knife in the process.

This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this item for the previous Repentance version, check this page instead.

The following tags are applied to this item:

Id	Description
uniquefamiliar	Cannot be duplicated via Box of Friends.
lazarusshared	Passive effects are shared between Tainted Lazarus' forms.
noeden	Unavailable as starting items for Eden and Tainted Eden.
quest	Quest item.

The following special synergies and interactions for Knife Piece 2 have been documented.

Mod	Item	Synergy
---	BFFS!	×2 damage for the full knife.

* Note that not all possible synergies and interactions are listed here.

Below is the Internal Item Description as shown in-game.
Note that some stat changes are not displayed here. Please see the main description for the full effects.

Knife Piece 2

• When assembled, forms a knife familiar that can charge across the room to damage enemies and can open a fleshy door
• Abyss: x1 locust .5x Isaac's damage