Spontanzauber
Verändere das Ziel eines Zauberspruchs deiner Wahl, der nur ein einzelnes Ziel hat.
An Aura spell on the stack targets the object or player which it will enchant upon entering. Thus, an Aura spell is a "spell with a single target", which means you may use Swerve to change that target. Doing so will cause it to enter enchanting the new target rather than the original one.