Rune Bag

Item Icon
Pickup Quote	"Rune generator"
Entity ID	5.100.389
Item Pool	Golden Chest Secret Room Treasure Room Secret Room Treasure Room
Quality	3
Item Tags
Collection Grid	(page 4, column 4, row 2) (page 4, column 4, row 2) (page 4, column 5, row 2)
Unlock Method	Defeat Isaac as Lilith

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

Effects

• Spawns a familiar that drops a random rune after clearing enough rooms.
  • Runes are dropped alternating every 5 or 6 rooms.
  • Runes are dropped alternating every 7 or 8 rooms.

Notes

• 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 a Rune Shard in place of the corresponding rune.

Synergies

• BFFS!: The drop rate is improved to every 4-5 rooms.
  • The drop rate is improved to every 6 rooms.

Trivia

This item is the rune counterpart to Bomb Bag, Mystery Sack, Sack of Pennies, and Sack of Sacks.

Seeds

PC H46A 1PJE (Treasure room adjacent to spawn)

Switch 9XX3 HWL2 (First Golden Treasure Room)

Bugs

Bug!	If one half of Tainted Lazarus holds this item, the Rune Bag will always drop the same rune for the whole run.

The Binding of Isaac: Rebirth
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