The backstory of Danzo was amazing. It was same as Orochimaru & Ero-sennin, Naruto & Sasuke and many others... With a difference that Danzo was coward, but still it appeared that he loved Leaf and wanted what's best for it(atleast in his opinion).
With that tetra-bomb he secured that noone will get his eye or any other part of his body. Guess he wanted to lure madara into it, but will see what the future brings.

I am waiting for Taka release since those subs here were just terrible, couldnt understand a thing.