Event Boundary

You attempt to influence the mind of a creature you can see within range to forget the task immediately on its mind. A construct or an undead is immune to this effect. It must make an Intelligence saving throw, and does so with advantage if you or your companions are fighting it. On a successful save, the target is unaffected and the spell ends. If it fails the saving throw, it forgets the task that was immediately on its mind until the spell ends or another creature reminds it of the task. The creature may make additional saving throws at the end of each of its turns to remember the task.

If the creature fails all of its saving throws, the effect lasts for an additional hour after which they immediately remember the task they had forgotten. During this time the creature makes no additional saving throws. The spell ends if another creature reminds the target of the task.

At higher levels. When you cast this spell using a spell slot of 2nd level or higher, you can target one additional creature for each slot level above 1st. The creatures must be within 30 feet of each other when you target them.