It was an enormous entity spanning over dozens of kilometers, just lying there like a low mountain range. If it were to stand up, the terrifying scene would be unimaginable.
This clearly isn't an easy feat, even for the King of Bones who gained significant support from the Plains of Bone; the best he could do was to slightly raise the corpse of the Obris Demon Lord, elevating the Giant Skull Castle hundreds of meters higher than its original position.
For the King of Bones, that was more than enough.
Because he didn't actually intend to transform the corpse of the Obris Demon Lord into an undead and fully animate it, which was something even the Undead Monarch Okas at his peak couldn't achieve. Even with the help of the Plains of Bone, he wouldn't possess the ability to surpass that demon lord.
