Somnambulatory Brew

This concoction looks, smells, and tastes like water. An identify spell reveals that it is imbued with enchantment magic but nothing else.

If you drink it, 1 minute later you must succeed on a DC 16 Constitution saving throw or fall unconscious for 1d4 hours. You remain unconscious until you take damage, or until a creature uses an action to shake or slap you awake.