A fellow adventurer, just like you, appearing in any non-Dungeon branch (inclusive) between Orc and Crypt / Slime. More dangerous than an orc warlord once he hastes and mights, and can swim to boot. Always comes with a shield, which has a chance of being reflection. Also comes with awesome speech that matches where he is. I hate that.
Took Haste and Might from {wiglaf} in 0.19 when Wiglaf took a long vacation to learn how to make lava cannons. Donald hated him too.