He is a Skeleton, but is much taller, wears a Crown and wields a huge Two-Handed Sword. In Single Player games with the Skeleton King Quest, he appears in a mini-level called King Leoric's Tomb which is accessible from Dungeon level 3. After pulling the necessary Lever to open his chamber, he attacks the player with a small company of skeletons. The King can create more skeletons to replace the ones that fall in battle, so the player should make him their primary target.
In multiplayer games, Leoric will appear anywhere on the third floor itself. A dead giveaway to where he is often lies in the massive horde of skeletons around him. Players should be especially careful if the Skeleton King is surrounded by a great gang of Skeleton Archers; this usually leads to a great deal of arrows fired in the hero's general direction, often resulting in worrisome amounts of damage in a quick timeframe. In these times it's advantageous to wear armor giving -Damage from enemies to prevent the health from rapidly going down. If the player can get rid of the archers somehow, be it through luring the King himself, or outright destroying them, he will not be as hard. He is however, considerably more powerful than the monsters around him, and will take much more damage to kill. It should also be warned that Leoric's attacks possess 100% Life Stealing, that is to say, every single point of damage he inflicts on the player is returned to him as Life up to his maximum, it may even exceed the maximum this way. The King is quite weak however, against the Spell Holy Bolt and fine quality Hammers which will make a short work of him. As a quest reward in Single Player he drops The Undead Crown. The great effect this item gives is a Life-Steal that stacks with other life-stealing abilities like Leech and Blood.
- "The warmth of life has entered my tomb. Prepare yourself, mortal, to serve my Master for eternity! (laughs)"
- In Diablo III, the Skeleton King makes another reappearance. His speech differs only little: it seems the Skeleton King no longer acts at the behest of Diablo, as he now states that the intruders will serve him for all eternity.
- He is voiced by Chris Metzen.