WoWDB

In Thok’s room, there is another cage that is usually ignored containing a large snail.  It is found on the leftside of the hallway as you venture towards Thok’s arena.  It must be opened three times before the snail is released.

When the first Kor’kron Jailer dies, instead of opening the usual cage, open the snail one instead.  An additional Jailer will spawn, which is killed, and use that key to open the correct cage to proceed as normal.  Do this during each kite phase, so you are effectively killing two jailers each time.  Get the boss as low as possible.

After the third transition, unlocking the snail’s cage will this time release the snail.  It will beeline for Thok – make sure you stay away while you kill the boss.  Once the boss dies, the snail will eat his corpse and credit will be granted to the raid.