I had an interesting time in a Stormwind raid today.

I encountered a mage I could not kill.

I death grip him in, silenced, blow cool downs and smash hit. His health went from 100% to 0% to 100% again.

I killed all Alliance near by, so I'm pretty sure he wasn't getting heals. As I continued to smash him, his health would ping-pong from 0% to 50% over and over again.

With 5x Dks, 5x Army, 2x Paladin HoJ, a Hunter, and my silence we could not kill him.

I think Cauterize was bugging out and proccing multiple times a minute. If this was not the case, then I don't know what is going on.