This would be a kickass idea as far as I'm conserned. An immortal combatant pretender that's not a vampire queen.
Personally I would just rip the stats for the Black Lord unit, perhaps add two to each attribute for good measure, slap the "immortal" power on him and leave him at that. Good solid 0 point pretender right there.
But I'm sure you guys will want to add one or two more powers on it just to spice things up a bit.
