Wanderdust

Wondrous item, rare

This red velvet bag is filled with a fine powder. You can use an action to take some of the powder and thrust it in a creature's face, forcing it to make a DC 15 Wisdom saving throw; it makes the saving throw with advantage if you or your allies are fighting it or if it's already been targeted by the dust within the last 24 hours. On a failed save, the creature magically forgets everything that happened within the last few seconds; at the start of the creature's next turn, it wanders aimlessly, using as much of its movement as possible to move in a random direction that is horizontal to you. The target won't move into an obviously deadly hazard, such as a fire or pit, but it will provoke opportunity attacks to move in that direction.

The amount of time lost to memory depends on the amount of powder used. You can use up to 10 uses of powder at a time (about a handful). When found, the bag has 1d12 + 8 uses of powder inside it. For each use of powder, the creature forgets the last 6 cumulative seconds of its recent memory.

"What was I doing again?"