Sacrificial Dagger is an unlockable passive item.
Effect
- Spawns a sideways dagger that orbits Isaac, deals high damage to enemies on contact, and blocks enemy shots.
- The knife deals 15 damage per tick or 225 damage per second.
Notes
- The dagger has a considerably larger hitbox than other orbital familiars, making it easier to use both offensively and defensively.
In-game Footage
Trivia
- In the original Binding of Isaac, Sacrificial Dagger rotated upright, while in Rebirth it now orbits on its side.
- This item is used in Challenge #4 (Darkness Falls).
- It does the highest amount of contact damage out of all orbitals.
- While the in-game name and Steam achievement name says 'Sacrificial Dagger', when unlocked, the in-game text shows 'Sacrificial Knife'.
Seeds
PC 99KW 09AC (treasure room adjacent to spawn)
Vita O98E HJO7 (treasure room adjacent to spawn)
Switch 
F4WJ R3DD (First Golden Treasure Room)
 Eve Unlocks
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 The Binding of Isaac: Rebirth
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