We'll that puts one idea to rest, anyone got anything else?

Yes that can be true, but how can it be considering this thread is still up and not closed. But what about this; In beta a item was used to summon this thing, that isn't out of reach just yet, DT in Section X at 10 stacks drops a charm that unlocks a boss called Dreadful Entity in a 55 12man operation. That boss is said to drop something somewhat similar to kill another boss named Hateful Entity I believe in a 55 12m operation. That boss has yet to be defeated and shown off with the specific item he drops but that could apply the correct buff to hit this unlocking the final sequence of the long boss fight in a second sense. This is a bit far off but trying to connect this with Queen Of The Sands that is going to become active in patch 2.3 or so better known as Dread Masters Patch. Would the chain move onto those two ops? I don't know but it would help explain a little but more about the "Dragon" that is on tattooing.

Kinda popping in this thread a little late, but is there any confirmation that this still actually works??? I had a guildy that remembers fighting this thing on top of the GTN. It was a certain item that applied a buff, then hitting the tombstone would activate it, bring forth a boss of some sorts. Being that this was over 2 years ago the item or the name of the item is unkown. Not sure if this is helpful in the least but it is something me and a friend Outlaw have been looking into for a while before we dug up this information.