Shadowform
Shadowform is a Priest spell in the WoW Forever client.
Assume Shadowform, increasing your Shadow damage by 10%, reducing the Mana cost of all Shadow spells by 50%, increasing the critical strike damage bonus of your Shadow spells by 100%, and reducing Physical damage taken by you by 15%. However, you may not cast healing spells while in this form.
Data from the WoW Forever client, build 1.60.1.70862, extracted .