DBDrake
Totaly A Dragon
My money's on that thing being a C'tan shard for a couple of reasons. Most notably, the giant skelebois at the end are clearly meant to be Necrontyr statues, so it's something Necron-adjacent, and C'tan makes the most sense out of Necron-adjacent things.
Also; That shit could totally be necrodermis; and the wierd messages could be "Yo there is evil sealed in this can, stop fucking with it"