5% damage buff in arena.

Was doing 3's for fun with some friends, one of my friends was running shattered halls for transmog while we were queuing.

He zoned into the arena with Curse of the Shattered Hand on, we just assumed it would disappear when the gates opened but it never did. It lasts for 2 minutes so you get about a minute worth of extra damage in arena. This isn't a huge exploit as you also take 15% extra damage, but if this debuff can be 'smuggled' into arena i'm sure there are more that are able to be taken in that may be more beneficial.