The instructions on the Faded Tablet say to place the Necravian Vessel near a skeleton. I've constructed the dragon, tigerwolf, & walghvogel skeletons and placed them in my throne room, but it doesn't seem that the Necravian Vessel can be placed in game. Do you have to have it near a skeleton in your inventory? That wouldn't make much sense to me, but I can't figure this out!!
UPDATE: I've also tried leaving a skeleton in my inventory next to the Necravian Vessel for a very long time, but nothing has happened.
I've googled this, but I can't seem to find much of anything about the Necravian Vessel at all.