Necropolis Acolyte

Necropolis Acolyte can be found in Naxxramas.

Abilities

 * Shadowbolt Volley - Hits for ~800 shadow damage
 * Arcane Explosion - Hits for ~650 arcane damage - casted simultaneously to shadowbolt volley, will go off when shadowbolt volley goes off.

Strategies
Separate them and burn them down from range.

Trivia
They bear a striking resemblance with Warcraft 3 Acolytes.