Corvin trades the rapier to his left hand. They step back from one another, though remain facing each other. Harry mirrors Corvin’s stance; left foot in neutral position, toes pointing forward, right foot in side position with toes pointed to his right. Left hand on his waist, rapier lowered to the right and point towards the ground. Thank Merlin they shrunk the weapon down to match his own size. It would be impossible to wield a regularly sized sword.