Can't you get it through your head, fanboy? I do not give a single shit about whether or not Aizen was immortal back then or not. The reason this argument started is because you thought Aizen is currently not immortal, which is bullshit, because he currently is. He has been since Gin tried to kill him.
Well duh, Yama is changing the climate with his bankai. But it is still not hot enough to instantly melt things and make things automatically catch on fire.
Aizen was immortal when Urahara sealed him. He has been since Gin tried to kill him, and he still is. Get it through your head, I'm done.
Naw he's not immortal he can be turned to nonthing I mean nothing at all..don't compare gin tring to kill him to yamamoto trying to kill him.