Active Sack is an unlockable familiar in Epiphany, a mod for The Binding of Isaac.

Grants a familiar that follows Isaac and drops a one-time-use consumable version of a random active item every 4 rooms.

Big rooms as having cleared 2 regular rooms.

The following items are blacklisted and cannot be spawned by Active Sack:
• Clear Rune
• Clicker
• Placebo
• Bob's Rotten Head
• Black Hole
• Gello
• Blank Card
• Glowing Hourglass
• Friendly Ball
• Flip
• Esau Jr.
• D infinity

Additionally, it cannot spawn items with any of these tags:
• angel
• baby
• bob
• guppy
• fly
• spider
• devil
• mushroom
• poop
• mom
• syringe
• book

It also cannot spawn items that have a special charge type, have 0 charges, or have more than 8 max charges.

It can only spawn items from the following item pools:

Normal mode	Greed mode
Treasure Room	Greed Treasure Room
Secret Room	Greed Secret Room
Shop	Shop
Curse Room	Greed Curse Room
Angel Room	Greed Angel Room
Devil Room	Greed Devil Room
Library	Library

Achieve Milestone #2 by unlocking 40% of Epiphany's achievements.

Active Sack can be found in the following item pools:

The following tags are applied to this item:

The following special synergies and interactions for Active Sack have been documented.

* Note that not all possible synergies and interactions are listed here.

• Check out the item description on the mod's external Wiki.
• Download Epiphany from the Steam Workshop.