[Oswald doesn't hesitate to rush the other; he's fought armored unicorns before, even killed a few...Such a small, pale copy of one doesn't make him pause. His legs feel almost like lead as he moves, but he forces himself forward and brings his sword up and a fierce swipe to take the thing's head off-

Which would happen, if the horse didn't choose to duck and try and parry the sword with the horn on its head. The Belderiver hits the Mesmerize's horn, making a high pitched pinging noise...And then the horn breaks off with a snap, leaving Oswald unbalanced and the monster reeling from the sudden loss.]