I posted this inappropriately so I thought I'd do it right. Apologies for the re-post.
I was playing solo 5v5 on the prison arena and came across a terrible glitch: The Oak's shield became constant at some point late in the match. I could beat on him all day long and he wouldn't lose any health or mana. He was silver like the shield or the revenge thing (forget the specific names). I'm not sure if he was constantly shielded, if somehow he was able to recast the shield immediately after it wore off, or if the revenge thing got "stuck" so that he didn't die after 10sec. I would guess the latter but I really can't say.
