In-game pickup line
“Eternal life?”
Mechanics
What Guppy's Collar does
- On death, has a 50% chance to revive Isaac with half a heart.
- Counts as one of the three Guppy items needed for the transformation.
In a run
Practical note
It may save a run, but the revive is a coin flip, so do not spend your last health assuming it will trigger.
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.
