Aw... If he'd wanted to make things he'd have stayed home and taken over the family business... Having that much responsibility sounds exhausting, he's glad he wasn't born into godhood because you'd need so much nerve to walk out on that... His expression is pretty clear that he's not going to ask any more about Creation. It's not exactly flat, because it's hard to be unimpressed with Elidibus, but it's clearly not enthralled.

The difference between passive listening and actively engaged is pretty clear when the sparks land on his hands and he lights up in awe. A voice in the back of his mind suggests that he try catching one in his mouth. He ignores it and lets them puff away into abstract power.

"For real? If it keeps me from running dry in a tough fight, I want to learn it!"

He's already got a lot of destructive spells he's trying to perfect, after all, some of them from principles Elidibus has introduced him to. He doesn't really need a godly deconstruction technique on top of that, he's only got so much hours and magic in the day.