Patch 7.0.3(2016-07-19): Re-added as an honor talent for Shadow Priests and redesigned.
Previous talent: Summons a Psyfiend that stands in place for 10 sec. The Psyfiend casts a Psychic Terror on a nearby enemy within 20 yards every 2 sec, preferring anything attacking the Priest. Psychic Terror causes enemies to flee for 30 sec. Damage caused may interrupt the effect.
Patch 5.4.0(2013-09-10): No longer benefits from Haste, and its health has been reduced by 75%, but fixed a bug where Psyfiend wasn't being affected by base Resilience.
Patch 5.2.0(2013-03-05): Pysfiend belonging to an individual Priest will no longer cast Psychic Horror [sic] on the same target twice.
Patch 5.1.0(2012-11-27): Psyfiend's Psychic Terror cast time has been increased to 2 seconds, up from 1.5 seconds. The Psyfiend's health has been reduced to 10% of the controlling Priest's health, down from 30%.
Hotfix (2012-09-28):A priest's psyfiend's Psychic Terror should no longer affect targets under a Rogue's Smoke Bomb.