- 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.
- If not every rune is unlocked, it will drop Rune Shards.
- BFFS!: The drop rate is improved to every 4-5 rooms.
- The drop rate is improved to every 6 rooms.
PC H46A 1PJE (Treasure room adjacent to spawn)
|The Binding of Isaac: Rebirth|
|Achievements||Attributes||Bosses||Cards and Runes||Challenges||Chapters|