Antispiral's Universe

Antispiral's Universe is an isolated universe located between the membranes of 10th and 11th dimensions created by Antispiral upon his birth. A grotesque and vivid space, where the Antispiral war lurked in. Mega galaxies that fill the heavens in very clear way with countless backdrop of jewel-like stars like a painting of surrealism. It's a different world that humanity has never set foot on. The universe itself has become an enemy of Simon and the others, bared its fangs.

Antispiral's Universe is a brane universe (also known as bulk or hyperspace) with a different set of dimensional axes and exist beyond the time and space corresponding up to an 11-dimensional reality that is created, occupied and fully controlled by Antispiral according to his every whim. As Antispiral is killed, so is this universe, as the energy that maintained this reality vanished.

Trivia

 * "Even if the infinite universe stands in our way!" was said by Leeron in episode 27, indicating Antispiral's Universe spreads endlessly and consisting infinite numbers of Super Spiral galaxies.

Source

 * 1) Final Drill Guidebook