Next item from Dragon Magazine #99’s Treasure Trove II is the Dust of Forgetfulness, originally by Richard Webb.
Dust of Forgetfulness
Wondrous item, uncommon
Found in a small packet, this powder resembles very fine sand. There is enough of it for one use. When you use an action to throw the dust at a character or other living creature, the dust the victim must make a DC 13 Wisdom saving throw or forget everything that has happened to him in the last hour (including having the dust tossed upon him). Enemies encountered during that time will be forgotten, paths explored will look unfamiliar, and newly made friends will be seen with suspicion. If a character’s immediate surroundings are similar to those the character was in an hour before, the character won’t even be aware of the difference without close examination (if any differences in environment exist). After one week, the lost memories will be restored, and no experience will be lost.
Player characters, if sprinkled with dust, should be forbidden by the DM to use “forgotten” knowledge.
PDF now available for download!