Theo jumped between them quickly, pacing in the open area he started rattling off rules, counting them on his fingers. "Verbal spells allowed - at your own risk, nothing lethal obviously, let's stick to jelly legs or dancing jinxes, disarming too. Hermione - no  furnuculus  hexes please, I quite like my skin the way it is. Right, let's start with one on one, if it becomes too easy we will up it to two against one."