I rather miss Divine Intervention.
For those who don't know, Divine Intervention was a spell that killed the casting paladin, but removed another player from combat and encased him in a unbreakable bubble for up to three minutes. It was generally used to save someone when wiping, or possibly to grief the tank.
Divine Intervention definitely was a clunky spell, mechanics-wise, but I always felt that it spoke to the heart of the paladin class. The paladin sacrificing herself to save a comrade.
I had the thought that--if it was still in the game--Divine Intervention would actually work really nicely with Mass Resurrection. Wipe is called, you DI anyone else still alive, and they Mass Res the raid.