Walnut is a trinket added in The Binding of Isaac: Afterbirth † expansion.
- After Isaac is hit by 1-9 explosions, the Walnut will be destroyed and spawns a coin, a heart, a key and another trinket. The pickups may be of any normal variety.
- Taking damage from the explosion is not required to trigger the effect.
- Bomber Boy: As Bomber Boy causes 9 explosions at once, laying a bomb and not moving before it explodes will always trigger the trinket.
- Host Hat / Pyromaniac: Not only Isaac becomes immune to explosions, but the amount of required hits is reduced to 1-5.
- Smelter: Walnut will still only activate once after being absorbed.