Gold and silver brothers

The Gold and Silver Brothers:
The gold and silver brothers are shinobis from kumokagure they wield the treasured tools of the sage six paths.

During their lifetime they                                  
were forced to Capture the Nine-

I think they're from..... the CLOUD village

Tails but was eaten by the beast
Alone! they survived by eating
the chakra in te nine tail's stomach            
and gain LOADS of chakra!
they managed to kill the 2nd
Hokage and Raikage in a peace
pact and successfully eliminated
the 2nd Hokage