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Multiply item
Multiply is an unlockable active item in Benighted Soul, a mod for The Binding of Isaac.
Description
On use
Discharges 1 charge.
Destroys non-boss enemies, and spawns equal friendly Dark Balls.
While held
Enemies damaged by Dark Balls will spawn friendly Dark Balls when killed (max 13).
How to unlock?
Defeat Ultra Greedier as Benighted Keeper.
Transformations
Leviathan transformation. Collecting 3 items from this set will grant Isaac flight and +2 Black Hearts.
Item pools
Multiply can be found in the following item pools:
| Name | Weight |
|---|---|
| Devil Room |
1.0/1.0
|
| Greed Devil Room |
1.0/1.0
|
| Red Chest |
1.0/1.0
|
| Demon Beggar |
1.0/1.0
|
Tags
The following tags are applied to this item:
| Id | Description |
|---|---|
| offensive | Can appear for  Tainted Lost. |
| devil | Contributes towards the Leviathan transformation. |
| nocantrip | Not available as card effects during the Cantripped! challenge. |
Special synergies
The following special synergies and interactions for Multiply have been documented.
| Mod | Item | Synergy |
|---|---|---|
| --- | Book of Virtues | Spawns 4 middle wisps that spawn a friendly Dark Ball when killed. |
| --- | The Book of Belial combined with Judas' Birthright | When used, at least 6 Dark Balls will be spawned. |
| --- | Void | After absorbing, only the effect on held is valid. |
* Note that not all possible synergies and interactions are listed here.
External links
- Download Benighted Soul from the Steam Workshop.
Lamp of Diligence 
Contact C 
Maxx C 
018 
Sneaky C 
Confronting C