They were an ancient confederation of mage clans who sought to bind the three prime evils for eternity the haradrim are now nearly forgotten and it appears that the bonds they wove are unraveling

Deckard Cain is a fictional character who appears in the Diablo video game franchise by Blizzard Entertainment. Cain is the last surviving descendant of the original members of the Horadrim, an ancient order of magicians charged with trapping the series' primary antagonists within enchanted crystals and guarding them thereafter. See also: Michael Gough (voice actor), Deckard, Diablo (video game), Diablo (series), Diablo III, Diablo II.