[quote=@Bishop]
[@Meta]... do we, right now, have a scientific explanation of spirits? The first part, where he engulfs someone's spirit with darkness to also disable their body is just that, power over the spirit realm.
Now when he comes to the physical plane, he can summon energies from the spirit realm to the physical one, energies which imitate a black hole but only working on energy and not affecting physical matter.
[/quote]

Souls exist, yes, but there isn't a ubiquitous "spiritual world" that runs parallel to the physical one. Some dimensions have it, others do not. Many things like that are universe specific.