Universal apocalypse blackhole 

A blackhole so large that it can swallow the entire universe.

'The universe grew so cold that all the stars faded into blackholes, merged and eventually grew into one so massive that it became a universal apocalypse blackhole, which swallowed the entire universe.'

Universal apocalypse blackhole by DianaLuciusDeCollis July 29, 2022

Universal core blackhole

The blackhole at the centre of the universe.

'Some say that The Big Bang was an explosion so massive that it tore one of the largest holes throughout space: A universal core blackhole, (aka. The Great Attractor)-located. at the centre of the universe and which has a gravitational pull so strong that all the galaxies orbit it.'

Universal core blackhole by DianaLuciusDeCollis July 30, 2022

Universal remnant blackhole 

A blackhole that was created by a dying (exploding, collapsing, etc.) universe.

'The previous universe grew so cold that all the stars faded into blackholes, merged and eventually grew into a universal remnant blackhole, which was so massive that it swallowed the entire universe, but fear not for a new universe could be reborn from it.'

Universal remnant blackhole by DianaLuciusDeCollis July 30, 2022