Caleb feels it. He feels that shift of magic, even if he doesn't know what it is. He sits up a bit straighter, eyes narrowing slightly as he considers Felix. Especially as he explains what he'd just done.

"That's handy. It's something like I learned in the other city. There... there were so many witches and magic workers. I literally lived using magic for everything," he said in a soft voice. He's mostly held it together until now, kept himself professional about it all and yet it's there when he talks. "It was something I never even let myself dream about. I was the adult, the one in charge, the eldest. I had to stop them from using, try and curb all our addictions and then here I was with the ability to use any kind of magic and learning from magicians in dozens of worlds and..."

He stops, knowing he sounds both like a forlorn teen and a lover longing for what he's lost.

"I have to find a way to get that back and... You're my last hope. Either to find a way to use again or to find a way back to Duplicity."

He knows it's putting a lot on a stranger and he sighs. "And if you can't, that's fine. I don't mean to put that much on you. I know what I'll do if you can't, and I'll live out my life."

He'll just use as much as he wants and die very young. He'd rather that than deprive himself, and he knows that's the addiction and he doesn't care.