In-game pickup line
“Controlled friend”
Mechanics
What ???'s Only Friend does
- Isaac can steer the familiar separately from his position.
- The fly deals 15 contact damage per second in Repentance, lower than in older versions.
Achievement #114
How to unlock it
Complete Boss Rush as ??? (Blue Baby).
Unlocking an item and finding it during a run are separate steps.
Explore more unlocksIn a run
Practical note
Guide the fly through a target while keeping Isaac at a safer distance.
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.
