The baleful revenant Mordekaiser is among the most terrifying and hateful spirits haunting the Shadow Isles. He has existed for countless centuries, shielded from true death by necromantic sorcery and the force of his own dark will. Those who dare face Mordekaiser in battle risk a horrific curse: he enslaves his victims’ souls to become instruments of destruction.
Mordekaiser was once mortal, a brutal warlord-king who ruled the lands of eastern Valoran long before the rise of Demacia or Noxus. He waded into battle bedecked in heavy iron armor and slaughtered all who opposed him, crushing them beneath his ensorcelled mace, Nightfall.
Source: The Publisher Website.