The Prey Inversion spell was one of the spells Willow Rosenberg cast during her time in Wonderland. This spell allowed the witch to save an ally from certain death by a predator, destroying the monster in a massive explosion while protecting the ally that became its prey. Willow used this spell to save Rack from the mother of the Hybberax that he previously killed. Willow herself stated that it was a spell that wasn't normally resorted to throughout history.
ELESA HOM EKTA BLIARE.
The witch directed her energies toward her target and said the words mentioned above. There was a small amount of time necessary before the spell would take effect. It resulted in a massive explosion that blew apart the target creature while leaving its prey unharmed.