[He raises an eyebrow as Kai comes over, not sure whether or not to back away. He decides not to, not least of all because it'd look weak. Instead, he watches, as Kai draws out the spell.

He's seen it fed with darkness before, once. But for Kai to do it intentionally is interesting. He would have flinched away from it before, wouldn't he?]

You do that so easily... it's quite interesting. Seeing you feeding the darkness into your spells... it shows a level of control you didn't have before.

[He reaches out to touch the spell, curiously.]