The Shadow

The Shadow was a mysterious entity, but very powerful. It forcefully has the form of a floating black hole with two red slit eyes. Deinoscorpio is a known servant. (Morytania: Operation Necrosis)

The Shadow is an entity that feeds on the energy of the dead. Whenever something dies, this energy is sucked in by The Shadow and it will gradually get stronger, until its form can be reverted back to its original. The Shadow is stuck in a vortex form, therefore it cannot kill to get the energy, it needs to dupe others.