Keriax, the multi-headed chaos dragon can be found in the Ancient Stone Circle. He holds the Crown of Chaos, an essential item for all players attempting an ultra ending. He is an extremely tough monster, with many different attacks. He typically has five melee attacks (ten attacks if raging) which poison the PC on successful hits. He is able to breathe all elements, and his breath causes corruption in addition to elemental damage. Finally, he is able to magically confuse the PC from distance and drain the PC's stats in the melee range. Keriax is immune to fire-based attacks and is able to quickly regenerate.