Regalia of the Horned Nightmare

2 pieces: (2) Set: Conflagrate critical strikes have a 20% chance to increase the critical strike chance of Immolate and Incinerate by 10%. Unstable Affliction critical hits have a 50% chance to increase all damaging effects of Drain Soul by 15% for 10 sec. Soul Fire has a 20% chance to increase you and your pet's damage dealt by 20%.

4 pieces: (4) Set: When a Burning Ember fills up, your critical strike chance is increased by 15% for 5 sec. Haunt has a 10% chance to refund its shard when expiring. Shadow Bolt and Touch of Chaos have a 8% chance to also cast Hand of Gul'dan at the target.