Seriously, that part where Gin clapped his hands is a bit confusing to follow. And the part where Aizen said "I reached the limit of my shinigami self" raises even more questions...
SHIT KUBO, WE JUST WANT ANSWERS, NOT MORE QUESTIONS
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Quote from Klapzi
The cool part is that I never get tired of being deceived
Quote from tactics
Just because someone's head was chopped off doesn't mean they're dead. That's just silly.