I have yet to see this in game, but is looks awesome! Thank you for the pictures and report. ^^

Kinda sad that it seems to be only at Horizon though. I know that is one of the most popular and accessible camps, but why should low ranks in Thanalan have all the fun? Iron Lake totally needs a pirate or toad invasion, and a bunch of skeletons and bats attacking the Cassie hollow crystal would be neat.