Rift

The rift is a spatial anomaly in the Energon portion of the Unicron Trilogy.

When the oppositely-charged energon from Unicron's body and detached head came into contact with one another, the cataclysmic result was a rift which sundered the very fabric of existence. Glowing bright yellow sometimes, and shimmering in deep black-purple at others, the rift constantly sucked in a stream of space debris, making it hazardous for anyone caught in its grip. On the other side, a peaceful realm of space existed, where, for a time, Alpha Q was able to nurture his precious planets.

It may or may not have had a black hole at its heart. It may or may not be a black hole.

There's a hole in the universe!Alpha Q, Ripped Up Space]