[Marc low-key loves it when someone's petty in a mostly harmless way. As soon as it escalates into violence, it's gone too far, but just rubbing something in someone's face? He supports that. (And enables it a little, because it's funny.)]

If you've got enough lore, you can probably put a magic spell on the pool. Make it so he bounces right back out the water if he tries to jump in, or somethin'. Maybe you don't even need lore for that. There's plenty of magic users in this place who might be up for enchantin' it if you ask around.