Mystery Sack

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Mystery   Sack
Item icon
Item altar
"?"
Table dividing line 1.png
Item ID
5.100.271
Table dividing line 2.png
Table dividing line 3.png
Collection Grid
Added in Afterbirth / Removed in Repentance(page 3, column 6, row 2)
Removed in Afterbirth(page 3, column 6, row 7)
Added in Repentance(page 3, column 7, row 2)
Unlock Method
Mystery Sack Defeat The Lamb as Eden

Mystery Sack is an unlockable passive item.

Effects[edit | edit source]

Synergies[edit | edit source]

  • 15►BFFS! BFFS!: The familiar drops pickups alternatingly every 4 or 5 rooms.

In-game Footage[edit | edit source]

Trivia[edit | edit source]

  • Before patch 1.04, this item did not drop any items or do anything at all.

Seeds[edit | edit source]

PC A3ES 1TQN (First floor, Treasure room next to spawn)

PC QHKQ ZE4N (First floor, Treasure room next to spawn)

PS4 CGVC XKY3 (Play as Isaac, and reroll the first item in the secret room just below the starting room)

Vita Q73A BMMP (adjacent to starting room)

Switch Greed mode only 3CAR V7Z0 (First Golden Treasure Room)


Eden Unlocks Eden Unlocks Eden Unlocks
Added in Afterbirth Added in Afterbirth † Added in Repentance
Blank CardBook of SecretsMysterious PaperMystery SackUndefinedGlitch Baby Eden's BlessingGB BugYellow BabyCracked Baby Eden's SoulMetronome 'MEverything JarThe CapriciousDELETE THIS
The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth
Achievements Achievements Attributes Attributes Bosses Bosses TarotCard.png Cards and Runes Challenges Challenges Chapters Chapters
Characters Characters MainPageBabies.png Co-op Items Items Item pools Item pools Monsters Monsters Objects Objects
Pickups Pickups Pills Pills Rooms Rooms Seeds Seeds Transformations Transformations Trinkets Trinkets
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