In Ultima Online, the Champion Skulls Set is an integral part of the Champion Spawn system. This set consists of six unique skulls obtained by defeating specific Champions in Felucca. Each skull represents a different Champion: the Skull of Greed (from Barracoon the Piper), Skull of Power (Rikktor), Skull of Venom (Mephitis), Skull of Pain (Semidar), Skull of Death (Neira), and Skull of Enlightenment (Lord Oaks). Once collected, these skulls can be placed on altars in the Star Room of Terathan Keep, summoning the formidable Harrower, a super boss that offers significant rewards, including stat-boosting Power Scrolls, upon defeat​