In Kael Drakkel: One nasty fellow, he spawns in front of the Temple of Kael (located in the back of the Arena area). He is a Warrior; hits for a max 700 (quads); single-target rampages; and is immune to slows.
In Kael Drakkel, the King's Madness: Same spawn location as in the regular Kael (pathway behind the arena, PH "a guardian of war"). Spawns two "a temple guardian" adds (these are rootable).
Location for your "kaelshard.txt" map file (note for all known Kael named spawn locations, see this quest entry):