In-game pickup line
“HP up”
Mechanics
What Stem Cells does
- Grants one red heart container and 0.16 shot speed.
- Restores one red heart when collected in Repentance.
From the game files
What you receive on pickup
Pickup grants
- Red-heart capacity
- +1
Heart values are shown in whole hearts. Character rules and health limits can affect the result.
In a run
Practical note
The extra container and immediate heal make it especially helpful after recent damage.
Reference
Game data and sources
The item ID, quality and pool listings, icon, game-file tags, and short pickup line come from the extracted Repentance files. This effect explanation is an editorial summary checked against the references below. Repentance+ can differ. Charge and pickup values shown above also come from the extracted items.xml.
