[AB+] Empty is an unlockable challenge in Alphabirth+, a mod for The Binding of Isaac.

Wormhole
Void
Abyss

Note: this list does not include characters' default starting items.

Only active items spawn, use Void, Wormhole and Abyss to complete the challenge.

The following is unlocked for completing the [AB+] Empty challenge: Fehu

Unlock Tainted Apollyon.

• Download Alphabirth+ from the Steam Workshop.