The village couldn't do anything to Kyuubi..it was The 4th..

Anyway to God#2 maybe each tail represents the previous power squared. So say 1 tail is 2x stronger, 2 tail is 4x, 3 tail is 16x etc. so say if the number of tails reaches 7..it would be 18446744073709551616x stronger.......

okay I'm wrong.