If he had not known that turning Ichibei Hyosube into a Quincy was impossible, Yhwach would have wanted to do exactly that.
After all, it was only after awakening this time that Yhwach learned that even after devouring the Spirit King and becoming a true "God," there were still people who stood above him.
"Indeed, among the many futures I can see, there are some in which I am killed by that Shinigami called Ailin."
"But among those countless futures, I have also grasped that single thread of survival."
"Aizen Sosuke, will you accept my invitation and join me in facing that man once more?"
"If you are willing to answer me, I will immediately lift your seal, grant you my bloodline, and bestow even greater power upon you."
"But if you choose to refuse, you had best think carefully. You will spend the rest of your life in this Mugen Jigoku."
"Even if I ultimately slay Ailin and successfully create a new world, I will not release you from Mugen Jigoku."
"You have three days to consider it. Three days from now, I will invite you again."
"For now, I want to learn more from you, the only person who has fought him."
"Then I'm afraid you'll be disappointed, Yhwach..."
Aizen Sosuke lowered his head and looked down at Yhwach on the ground with his unsealed eyes.
"Two years ago, my unstable state of mind caused an error in my evolution."
"Therefore, in my battle with Captain Ailin, I failed to force out more of Captain Ailin's power."
"Now, although I have once again completely fused with the Hogyoku and successfully evolved along the correct path, making me far stronger than I was two years ago..."
"Even if I fought Captain Ailin in my current state, I do not