Key Bum
AchievementAfterbirthUnlock unknown
Achievement details
- Achievement number
- 200
- Description
- Unlocked a new item.
- Requirement
- Defeat Ultra Greed as Lazarus
How do you unlock Key Bum?
In The Binding of Isaac, Key Bum is unlocked by earning the Ultra Greed completion mark as Lazarus (Character).
Structured pathSource-backed requirements are mapped into trackable steps.
Unlocked a new item.
How to unlock: Have 4 or more Soul Hearts at one time
What unlocking Key Bum leads to
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13