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▾Table of Contents▾
Rainbow Mainspring item
Rainbow Mainspring is an unlockable passive item in Isaac's Limbus, a mod for The Binding of Isaac.
Description
When entering a room, if there are enemies, Isaac doesn't take damage for 10 seconds.
How to unlock?
Defeat Ultra Greedier as 
Rodion.
Item pools
Rainbow Mainspring can be found in the following item pools:
| Name | Weight |
|---|---|
| Treasure Room |
1.0/1.0
|
| Shop |
0.8/1.0
|
| Secret Room |
1.0/1.0
|
| Crane Game |
1.0/1.0
|
| Rotten Beggar |
1.0/1.0
|
| Greed Treasure Room |
1.0/1.0
|
| Battery Bum |
1.0/1.0
|
| Greed Shop |
1.0/1.0
|
| Greed Devil Room |
1.0/1.0
|
| Wooden Chest |
1.0/1.0
|
Tags
The following tags are applied to this item:
| Id | Description |
|---|---|
| tech | Contributes towards unlocking  Technology Zero. |
External links
- Download Isaac's Limbus from the Steam Workshop.
Coupled Oscillation 
Crown of Thorns 
Impending Wave 
Rusty Mainspring 
Red Order 
Piece of a Torn Spring