Corruptor's Crown (WAR History and Lore)  

Inside the RvR area there is a cave with entrances at both 41k/500 and 37k/2k. Entering the cave and running to about the halfway point will trigger the unlock. Be careful if you are over-leveled for the zone as entering the RvR area will turn you into a chicken!

History & Lore in Talabecland