Devouring Horde

You reach into the soul of one creature you can see and force it to make an Intelligence saving throw. A creature automatically succeeds if it is immune to being frightened. On a failed save, the target is convinced that all creatures around it have become hostile undead masses, all creatures it can see are considered hostile until the spell ends. It can repeat the saving throw each time the target takes damage.

Whenever the affected creature chooses another creature as a target, it must choose the target at random from among the creatures it can see within range of ability it’s using. If an enemy provokes an opportunity attack from the affected creature, the creature must make that attack if it is able to.