Bleach: I Fuse Infinite Clones, Leaving Aizen Stunned

“When did you start having... the illusion that I hadn’t used my Kyoka Suigetsu?” Aizen asked calmly, slowly pulling his sword from the corpse.

“Then I’ll ask you the same thing: when did you start having... the illusion that you’d already killed me?” A second Feng Xun appeared.

Feng Xun transmigrated to Hueco Mundo.

For some reason, his true body could not leave the boundaries of his domain.

But every day, he was randomly granted a Level 1 clone of a Soul Reaper, Hollow, or Quincy.

Two Level 1 clones could be fused into one Level 2 clone.

Two Level 2 clones could be fused into one Level 3 clone...

While Aizen was still trying to figure out how to break through the limits of a Soul Reaper, Feng Xun had already crossed that threshold without a hitch through fusion.

While Yhwach was still boasting about The Almighty, Feng Xun had already erased him simultaneously across ten thousand timelines.