ToME: the Tales of Maj'Eyal

That is: Fyrk, Faeros High Guard, boss of the Charred Scar. I don't see any gameplay reason for monsters to have teleportation runes, but on a boss on a level of this size, it's just downright cruel.

Also, it looks like he killed a bunch of the orcs, since I found a stack of battleaxes while searching for him. But then he probably teleported somewhere off the accessible level during one of those fights, since none of the loot piles looked like boss loot.