[ Ordinarily, he'd be secretive. If this were his own world, he wouldn't even be visible right now. But this isn't his world, and the rules are different. He has to work with these people, and besides.

If this is going to be a fair fight, it's right that she knows. ]

They're runes. They make me faster, stronger, more accurate. They do a lot of different things.

[ Too many to list, unless she wants to sit down for a lecture on the subject. Jace prefers to teach with action, anyway. ]

It makes me stronger than most Mundanes, so I'm not sure you want my worst.

[ But we'll see. He comes closer anyway, arms raised. His first couple of jabs are far from difficult, easy enough to block providing she's not a total novice. ]