"What? Spirits? That's... that's unfair! We killed them already! These beasts are so retched even death doesn't want them."— Skular(src)
In the Ruins of Sescheron, players may find a circular arena with a ceremonial Ice Clan Khazra drum and the three golden statues of ancient Goatman heroes. Upon clearing the arena, one may touch the drum, breaking it.
This will cause one of the statues to come to life, spawning Talos. Killing him and his acolytes will cause the second statue, Mawdol, to come to life as well, also spawning a group of Khazra acolytes of the same type. Last one, after Mawdol's death, is Korbal, also assisted by his acolytes. All three Khazra heroes may summon more acolytes if those are killed.
Killing the two other heroes will result in all three appearing again, this time in form of ghosts, with same stats, and again with groups of ghostly followers. Killing the three guardians again will conclude the event.