Mastery: Master Demonologist is the Mastery for Demonologywarlocks, improved by the mastery secondary stat. This mastery increases the damage done by the warlock's demons.
Patch changes[]
Patch 9.0.1 (2020-10-13): Level reduced from 78 to 10.
Patch 7.0.3 (2016-07-19): Now learned at level 78 (was 80) and redesigned: Demonic Empowerment also increases the damage of your demons by 14.4%.
Old: Increases all damage done by you and your demon servants by 10.0%. Further increases the damage of your Touch of Chaos, Chaos Wave, Doom, Immolation Aura, and Soul Fire while in Metamorphosis by 20.0%.
Patch 6.2.0 (2015-06-23): Effectiveness decreased by 4%.
Hotfix (2015-01-12):Mastery: Master Demonologist's effects have been increased by 33%.
Patch 6.0.2 (2014-10-14): Redesigned: Increases all damage done by you and your demon servants by 6%. Further increases the damage of your Touch of Chaos, Chaos Wave, Doom, Immolation Aura, and Soul Fire while in Metamorphosis by 12%.
Old: Increases the damage done by your demon servants by 8%. Increases damage you deal in caster form by 8%. The damage you deal while under Metamorphosis increased by 24%.
Patch 5.0.4 (2012-08-28): Redesigned: Increases the damage done by your demon servants by 8%. Increases damage you deal in caster form by 8%. The damage you deal while under Metamorphosis increased by 24%.
Old: Increases the damage done by your demon servants and damage you deal while transformed into a demon by 18.4%. Each point of Mastery increases damage by an additional 2.3%.
Patch 4.3.0 (2011-11-29): Now grants a base bonus of 18.4% and 2.3% per mastery, up from 16% and 2% per mastery.
Patch 4.0.6 (2011-02-08): Benefit from mastery increased by approximately 33%.