In-game pickup line
“Protect him”
Mechanics
What Lost Soul does
- The familiar dies to one hit and returns at the start of the next floor.
- If it reaches a floor transition alive, it can reward Isaac with hearts or an item.
Achievement #460
How to unlock it
Defeat Mother as The Lost.
Unlocking an item and finding it during a run are separate steps.
Explore more unlocksIn a run
Practical note
Protect it in dangerous rooms to earn its floor-transition reward.
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.
