Fairy in a Bottle is a rare potion: "When your HP would be reduced to 0, instead this potion is discarded and you heal to 30% of your Max HP." You cannot drink it yourself; it triggers on its own.
How much it heals
It heals 30% of your max HP, and always at least 1 HP. Since the 12 March 2026 patch it also works when your max HP is 1.
| Max HP | HP after it triggers |
|---|---|
| 60 | 18 |
| 70 | 21 |
| 80 | 24 |
Deaths it prevents
Fairy in a Bottle stops any normal death: attack damage, HP loss, and Doom. Doom that reaches your HP at the end of your turn kills you through the same check, so Fairy in a Bottle saves you from it.
Deaths it cannot prevent
Some deaths are forced and skip every death-prevention effect:
- The Insatiable's Sandpit. The act 2 boss The Insatiable counts down its Sandpit; when it reaches 0 on its turn, you are eaten and die. Fairy in a Bottle does not trigger.
- Abandoning a run.
In co-op
Fairy in a Bottle only saves the player holding it. It does not trigger when an ally would die.
It cannot be created in combat by effects that generate random potions. See potion drop rates.