“It's a standard feature in many teleport spells.” Twilight mumbled something under her breath, then looked back at Fleur eagerly. “The early versions only allowed for inanimate objects. According to his diary, Starswirl once teleported and wound up at his destination without clothes or shoes, and as a result modified the original spell. Subsequently, it was further modified to allow for a caster to take a companion who was touching her at the time the spell was cast.”