HE SHOULD HAVE KILL THIS ELF WHEN HE MET HIM
yeah and Hitler's mom should have swallowed instead but we don't all get hindsight unfortunately
Take Them!
It's a perfect chance to gain knowledge and loyalty.
Plus you have the shock value once they figure out who you truly are and see the true power behind you.
Chance of rebellion from a fallen kingdom deeply indebted and intimidated: 0%
does come with a potential issue of his existing citizens not liking them though.
the half-elves will probably be worshipping the ground he walks on after this.
I'm more interested if what he does with the rest of the elves if he ends up conquering. their leadership needs to die horribly of course but what about your typical citizen? taking THEM in is going to cause problems no matter what, killing them all is probably something he'd avoid if there's an alternative, etc