To complete the Final Boss achievement, you must kill: * 5000 General Graardor, K'ril Tsutsaroth or Avatar of Destructions * 100 K'ril Tsutsaroths * 100 Avatar of Destructions * 100 Chaos Elementals * 100 Corporeal Beasts * 100 Borks * 100 Tztok-Jads * 100 King Black Dragons * 100 Giant Moles * 100 of each Wilderness Bosses