Revenant Wizards

Revenant Wizards are enemies in the Pale Heart cave fight at the end of Alone in the Dark. The team clears the wizards on the left and right sides of the cave, which activates three crystals. Shooting all three crystals brings down the boss's shields for 15 seconds, and once the shield drops the team damages the boss. The cycle of clearing the wizards, shooting the crystals and damaging the boss repeats until the boss is defeated.

Earlier in the quest the route runs through The Seclusion in the Pale Heart to reach Crow.