JJK: Fate Begins

Time passed very quickly, and soon the moment arrived when Toji set his sights on Gojo for his bounty, and the time for Tengen to merge with the Star Plasma Vessel came to be.

During this time, Aizen had already collected around 7 fingers of Sukuna and possessed something akin to cursed wombs that were special grade, made from specimens from one of Japan's great curses, Michizane Sugawara. Sugawara was one of the greatest sorcerers to ever live, who Yuta and Gojo are distant relatives of. Aizen had never performed any experiments on himself until now and was patiently awaiting the completion of the Hogyoku, which was almost finished, lacking only a few crucial parts like data of awakened Gojo Satoru and Toji Zenin, as well as Geto with cursed spirit manipulation and Megumi's Mahoraga, which was the most important of them all.

During this time, he had trained his own cursed technique to the limit, possessing more cursed energy than any living being on the planet right now. He was one of the most powerful beings standing at the moment, even without the Hogyoku. The only ones who might be a threat to him now were Gojo Satoru, Sukuna, or any exceptional ancient sorcerer he might not be aware of.

Even though he was one of the strongest, he hadn't learned the ultimate move, that is, Domain Expansion. He was waiting for his Hogyoku to fully complete before attempting something like that.

Now, as he was aware that Toji and Gojo were going to have their encounter, he started preparing for any unforeseen consequences, taking precautions against any weapon similar to the Inverted Spear of Heaven in case they targeted him or used moves that could counter his time manipulation.