Potion of invisibility

Quaffing effects
If quaffed by a monster, it becomes permanently invisible (unless it is wearing a mummy wrapping). If the potion was cursed, you are awoken and told the monster's position.

If the potion hits a monster, it becomes permanently invisible (unless it is wearing a mummy wrapping).

Identification
This potion is very often identified for you when a monster quaffs it. It self-identifies only if you manage to observe yourself becoming invisible.

Strategy
See invisibility for details on being invisible.

This potion is a prime candidate for dilution, as you rarely need more than one, if any. It is best picked up in order to deny monsters its use.