Evanesce

With a wave of their hand, the caster turns invisible for a brief period, sometimes causing those adjacent to forget that the caster was even there.

The caster becomes invisible until the start of their next turn.  In addition, all characters adjacent to the caster must make an Intelligence save.  If they fail, they forget that there is a character in the caster's square.  If the save is successful, they remember the last location of the caster.