Eternal Damnation (3.5e Invocation)

In a display of your power over the Abyss, you cast your foe into its depths, cursing them to a horrible demise at the hands (or claws) of the otherworldly denizens of whatever layer you choose.

This functions as a plane shift spell that can only affect an enemy. You are able to freely determine the target plane with perfect accuracy, but the victim can only be sent to a layer of the Abyss.

Once there, the enemy is magically bound to that layer (as though they are under the effect of a dimensional lock) and unable to leave by any means. This effect is permanent until removed by a freedom, wish, or miracle spell.