You can attack people in other dimensions? That is kinda cheap, but...

Tangent holds his hand out. A small portal appears, and he throws a crystal in. The crystal breaks... and a wave of strange energy comes out. Magic crystal uses white noise! Everyone on the other side is unable to use magic! Tangent closes the portal.

Please. Attacking someone while dead? I though it was bad enough with all that attacking while asleep and being able to easily hit invisible people.