Akk'erath's Illusory Dominion

Three Humanoids you can see within range must succeed on a Wisdom saving throw or have the Charmed condition for the duration.

A creature Charmed in this way cannot distinguish friend from foe. The faces and features of allies and enemies alike seem to swim and morph before its eyes. It may attack targets at random if it is hostile to the caster, or simply treat all creatures as allies otherwise. Each time it defeats or incapacitates a friendly creature (not one affected by this spell) it may repeat the save.

Using a Higher-Level Spell Slot. You can target one additional creature for each slot level above 6th.