Brain Eater

First referenced:

The Desolate Guardians (Part 3)

Additional references:

The Desolate Guardians (Final Part), 'I think I may have missed the end of the world..... {Part ??}'

Described as black transmorphic spheres of unknown size and origin, these entities are capable of rapid evolution against all attacks against them. First witnessed as attacking a parallel Earth where Heath spent eleven hours disarming a global nuclear strike triggered in response to their presence, the brain-eaters were also witnessed on The Author's Earth attacking a large hulking entity in the distance.

Traits: Capable of rapid defensive evolution against attacks. Likes to spear biological life in the skull, and take up residence within (the effect on the victim is unknown).