Mastering the Stock Market Like A Shadow Priest

Shadow Priests draw their power from the void and deal damage through the use of damage over time effects (DoTs) such as  Shadow Word: Pain,  Vampiric Touch, and  Devouring Plague. Shadow uses a resource called  Insanity, which is gained by casting the majority of Shadow's spells, such as  Mind Blast and  Mind Flay.  Insanity can be spent casting  Devouring Plague or  Searing Nightmare (while channeling  Mind Sear and talented into it).