I found a drink, Sulfuron Slammer - Item - World of Warcraft, which is sold by Plugger Spazzring - NPC - World of Warcraft in BRD (the gnome walking on the bar at the area where the drunk dwarves are)... Well, the thing with this drink is that it puts a debuff on the user that lasts 5sec and do 4 fire dmg at the 3rd sec and at the end of the debuff.
You can use it before a mage casts polymorph on you or anyother breakable by damage CC.
Tested it in duel and it worked, but it didnt in arena.
Hope it will prove of use to someone
I searched before posting, but i'm sorry if its repost and didnt find it :/