V. 1.15 - Some new synergies (ideas by Valorium):
-Book of Shadows: Enemies that you come into contact with ignite.
-Crystal Ball: Spawned soul hearts become black hearts.
-Best Friend: Spawn fires in a hexegonal pattern upon exploding.
-Dead Sea Scrolls: Active items are choosen from the devil pool instead, barring a few exceptions (such as Razor Blade)
-Monstro's Tooth: Spawns Monstro II instead, who fires a brimstone at a nearby enemy before leaving.
-The Poop: 50% chance to spawn a black poop instead.
-Yum Heart: Grants temporary damage for each heart you have.
-Book of the Dead: Spawned white bonies become red champions.
-Sharp Straw: 5% chance to spawn a black heart for each enemy damaged.
-Keeper's Box: Spawned items are taken from the curse room pool instead of the shop pool.

V. 1.0 - Mod Release.