Mass Confusion

From Diablo Wiki

The Mass Confusion skill is a curse-like mind control attack that summons a blue spirit wherever the Witch Doctor targets it.

The spirit incites paranoia in some of the monsters in range, causing an aqua light to appear over their heads. Afflicted monsters seem to lose their AI, and they mill around more than usual. They may also attack, or be attacked by, other monsters. They are not the Witch Doctor's minions though, and are not under his control, so he can kill afflicted monsters just like any other monster.

Witch Doctor Skills
Spirit Skills — Mass Confusion • Skull of Flame • Firebats • Soul Harvest Voodoo Skills — Horrify • Wall of Zombies • Summon Zombie Dog • Sacrifice Plague Skills — Locust Swarm • Plague of Toads • Spider Statue