Quote Originally Posted by RyougaZell
Not the way I expect things to end at first, but it wasn't so bad.
I did really expect Pain to do this... to free all the souls he took. Though I wonder how he managed Kakashi... since his soul wasn't taken. A nail-hole on the forehead is kinda hard to recover...

Oh well. Seems we are back to Uchiha-land.
Nothing is mentioned about souls he took. Its power over life and death period. He's just expending what is left in his body to bring back everyone who died since he invaded Konoha.