A potion of monster detection will show all monsters on the current level when quaffed.
- A blessed potion will show all monsters on the map for 21–60 (more) turns.
- An uncursed potion will show just the monsters against a black background, and will exercise Wisdom if any are found.
- A cursed potion has the same effect as an uncursed potion, but will also wake all sleeping and paralyzed monsters on the level. (“Monsters sense the presence of you.”)
If you already have 300 or more turns of monster detection, a blessed potion will only add one more.
If you quaff a non-blessed potion while there are no monsters on the current level, you will receive the message :
You feel threatened.