fight at karakura town
no reiatsu crush
they can see each other
both want to win
@taichokage: He has an immortal lifespan and insane regeneration ( pretty much like buu ) But i still don't consider him all immortal because if you disintegrate ( Or use a moon busting attack which will destroy his entire body ) him he will cease to exist and he was scared of ichigo even if he cannot be killed.
Dude, have you been reading Bleach lately? There are more ways to kill a Shinagami, like aging, burning, beaten half to death and energy arrow (and Aizen is a different story, since he is an immortal now)
So showing that scan is just silly :)