WoWDB

Affliction:

Your Malefic Grasp, Drain Soul, Fel Flame or Haunt spell grant you and your pet a shadowy shield that absorbs 20% of the damage dealt for 15 sec.

Demonology:

Your Shadow Bolt, Soul Fire, Fel Flame and Touch of Chaos spells grant you and your pet a shadowy shield that absorbs 10% of the damage dealt for 15 sec.

Destruction:

Your Incinerate, Fel Flame and Chaos Bolt spells grant you and your pet a shadowy shield that absorbs 10% of the damage dealt for 15 sec.