Black Hole

Getting into the tag
The tag can be found in a galactic center, 20% chance in galaxy arms, and has a 0.01% chance of appearing in thoughts.

In the tag
In the tag is the archetype called inside the black hole which inside that archetype has a white hole. "inside the black hole" has a 0.5% chance to have an 'end of universe note' and a 0.2% chance to contain a crustacean.