Having used Mugetsu, the bandages on Ichigo's face are coming off.
Aizen comes falling from the sky with his weird mask removed.
Ichigo: Is he going to regenerate again...!
Ichigo loses his shinigami powers, and returns to being orange Ichigo
He falls to his knees, pitching forward
Ichigo (Crap... My shinigami powers are... Disappearing...)
Aizen stands up. This is your loss, Kurosaki Ichigo. Look, my zanpakutou is disappearing... You of all people should understand what that means...
Aizen's right eye is white, left eye is a hollow, and is turning into a hollow from the mouth. "The Hougyoku has deemed that I have no need for a zanpakutou!!
Just like you, who became one with your zanpakutou and that ability, no, I have surpassed you, who has lost all your powers, and I will rise to an even greater height
This is the end! Kurosaki Ichigo!!!
A light goes through Aizen from the hole in his chest?
Aizen: What is this...!! Kidou...!? When did this...
Urahara: It seems it finally activated, huh
Aizen: Urahara Kisuke...!! Is this your doing...!
Urahara: Yes. I cast that kidou into you before you completely evolved... When you were ultimately careless, and I cast it by riding it on another kidou
Aizen: That time...!
Urahara: ... That is a seal. If you were to fuse with the hougyoku, I thought it'd be practically impossible to kill you. So that's a new kidou I developed to seal you.
Aizen: Is that so. But what a pity. Look, even now, I am undergoing further evolution. As if such a level of kidou could seal me!!
Light? penetrates his body
Aizen: Wh... What is this... My power... The power I attained is... Disappearing...!!
Urahara: ... That is the will of the hougyoku. The reason why the seal I cast then is activating after so long is because your power had grown weak.
The Hougyoku's saying it isn't recognising you as its master any more.
Aizen: Impossible... There's no way... There's no... There's no way....
A round Aizen.
Slowly reutrns to normal Aizen. Urahara Kisuke!!!! I despise you!! Why do you do nothing even though you have such intellect!! Why do you go along with such a thing!!
Urahara: Such a thing...? The spirit king, you mean...? ... I see, you saw it, didn't you. When the spirit king is not around, the whole Soul Society will break apart.
The spirit king is the lynch pin. If we lose the lynch pin, it crumbles easily. That's the way the world is.
Aizen: That is a loser's logic!! A victor constantly speaks not of what the world is, but of the way the world SHOULD be!!!!
I---
Ichigo stones.
Ichigo narrows his eyes.
Ichigo averts his eyes.
Aizen disappears.
Ultimate seal!!