A Thing from Beyond serves you in combat, blasting enemies for 0.939 × SP Shadow damage.
After conjuring Shadowy Apparitions, gain a stack of Idol of Yogg-Saron. At 20 stacks, you summon a Thing from Beyond that casts Void Spike at nearby enemies for 20 sec.
Void Spike
Hurls a bolt of dark magic, dealing 357 Shadow damage and 185 Shadow damage to all enemies within 10 yards of the target. Damage reduced beyond 5 targets.