Guard Fengus

Guard Fengus is an ogre mini-boss found in Dire Maul North.

He patrols around Fengus's Chest which contains the Gordok Courtyard Key. If you gain the King of the Gordok buff from completing the Tribute Run, he will become friendly and offer the buff Fengus' Ferocity: "Attack power increased by 200." for 2 hours. This now depends on the level of the player, since in Patch 2.1 the following change was made: "Fengus' Ferocity, Mol'dar's Moxie, Rallying Cry of the Dragonslayer, Slip'kik's Savvy and Spirit of Zandalar these buffs will no longer work on targets over level 63."

Dungeon Journal
Ever since Cho'Rush the Observer told him he was destined to meet a mate while on duty, Fengus has spent almost every waking moment patrolling Gordok territory.

Quotes
Talking to him after becoming the king: You da man now, dog!