Rune Bag

Rune Bag is an unlockable passive item added in the Binding of Isaac: Afterbirth expansion.

Effects

 * Spawns a familiar that drops a random rune alternatingly every 5 or 6 rooms ( 7 or 8 rooms).
 * If there are no runes unlocked, it will drop cards instead.
 * Rune Bag will also drop Soul Stones if any have been unlocked.

Synergies

 * : The familiar drops runes alternatingly every 4 or 5 rooms.

Seeds
H46A 1PJE (Treasure room adjacent to spawn) 9XX3 HWL2 (First Golden Treasure Room)