Shadow Tome: Shadowform

"Assume a Shadowform, increasing your Shadow damage by %, reducing all damage done to you by and threat generated by However, you may not cast Holy spells while in this form except Cure Disease and Abolish Disease. Grants the periodic damage from your Shadow Word: Pain, Devouring Plague, and Vampiric Touch spells the ability to critically hit for increased damage and grants Devouring Plague and Vampiric Touch the ability to benefit from haste."