Because Aizen wants to kill the King
The only way to get to him is to make the key

whats the point in that? so he could become king?

and if aizen barely killed cpt commander how would he kill the king? im only guessing the king is 1000x stronger

That's what the Hougyoku is for, to make him stronger, strong enough to kill the king. :]

Aizen will soon give a hint as to why he wants the current king gone, but I don't think they made it very clear.
Don't wanna spoil anything.

This post was edited by Vicc on Feb 2 2011 11:00pm

to my knowledge there has never been an indicator that the king is strong so his strenght is un known but what is know is he recruits the top members of the 13 courts into his own personal squad 0 the best of the best over hundreds and hundreds of years,

Also to my knowledge there has not been a stronger death god then the captain commander in thousands of years if you recall azien wouldn't take on the commander straight up and created wonderwiess just to fight him who is able to absorb fire

its safe to assume squad 0 is > then squad 1-13 but squad 0 is less powerful then the captain commander

This post was edited by five33 on Feb 2 2011 11:15pm

theres a fucking leader to Squad 0 as well.... Captain commander is only the leader of squad 1 and the 13 court guards. the leader of Squad 0 is above him in power.

maybe but captain commander was known as the strongest shinigami there ever have existed in soul society.

The point is Kenpachi > all shinigami.

arg I more like Byakuya Kuchiki, he is so ice cold from the start

But Kenpachi doesn't know any soulslayer techniques and can't even realease his soulslayer, and yet his skill was enough to get him a captain position.

no he killed a captain therefor he became a captain