Repentance · active · #510

Delirious

Summons a friendly boss form for the current room.

Typeactive
Quality1
Listed pools1
UnlockAchievement #338

In-game pickup line

“Unleash the power!”

Mechanics

What Delirious does

  • Using the active item creates a friendly Delirium-styled boss ally.
  • The ally fights enemies until Isaac leaves the room.

From the game files

Recharge

Standard recharge12 room clears

Standard room-clear recharge. Batteries and other effects can change how quickly it refills.

Achievement #338

How to unlock it

Defeat Delirium.

Unlocking an item and finding it during a run are separate steps.

Explore more unlocks

In a run

Practical note

Use it in a difficult combat room where the summoned boss can contribute immediately.

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.