[ what he notices more is actually her lack of reaction. a pen magically turning into a sword would be pretty strange to your average person. to someone normal, from a normal world.

and, truthfully, he hesitates. attacking an unarmed person isn't really his M.O. even if she's pretty much inviting him to. but this is just training. still, he goes ahead and warns her, ]

There's something you should know. This blade isn't made of ordinary metal. If you're a regular mortal, it'll pass right through you. But gods, monsters, demigods, all that? Then it's deadly.