468px-Coren Direbrew
Coren Direbrew is a Dark Iron Dwarf who acts as a seasonal boss in the popular MMORPG, World Of Warcraft. He is the mastermind behind the incessent attacks on the Brewfest Festival, being driven by jealousy over not being invited to partake in the festivities himself.
He is only available during the Brewfest Festival (which starts on 2oth September and finishes roughly on 4th October). After which players must wait another year before they can face the fearsome dwarf again.
Despite being an endgame boss (being upgraded to level 85) he is a rather basic fight and experienced. Players should have no problem beating down this bully - even when he summons his Dark Iron comrades to fight on his behalf.