What is the music that plays in Bleach Episode 46 ~19:54 Can you guys tell me what the name of the music that plays in Bleach episode 46 around 19:54. When Aizen and Ichimaru arrive to save the students from hollows. I love this song and can't find the name on the internet.
It's called 
BL_16 (Reminiscence - "Bankai... Senbonzakura Kageyoshi") 

Although it is sometimes also known as Destiny Awaits - Bankai Version

As with most music in Bleach, it is composed by Shiro Sagisu.

It can be found here: https://www.youtube.com/watch?v=Ei5UmDyB0i4