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Keystone item
Keystone is an active item in Reverie, a mod for The Binding of Isaac.
Description
On pickup
+3 keys.
On use
Creates an earthquake that lasts for 4 seconds, destroys rocks and doors, and drops rocks from the ceiling. Each rock deals Isaac's damage. Using the item more times increases the earthquake's duration.
The earthquake deals damage to all enemies on the ground. The amount is about 11.4% of their current HP per second.
Transformations
Item pools
Keystone can be found in the following item pools:
| Name | Weight |
|---|---|
| Treasure Room |
1.0/1.0
|
| Greed Treasure Room |
1.0/1.0
|
Tags
The following tags are applied to this item:
| Id | Description |
|---|---|
| offensive | Can appear for  Tainted Lost. |
Special synergies
The following special synergies and interactions for Keystone have been documented.
| Mod | Item | Synergy |
|---|---|---|
| --- | Car Battery | The earthquake lasts for 8 seconds. |
| --- | Book of Virtues | Spawns rock wisps that shoot rock tears. |
| Reverie | Lost Memory | Character: Tenshi Hinanawi |
* Note that not all possible synergies and interactions are listed here.
YouTube video
External links
- Check out the item description on the mod's external Wiki.
- Download Reverie from the Steam Workshop.
Geographic Chain 
Rune Sword 
Escape 
Angel's Raiment 
Bucket of Wisps 
Plague Lord