4 hokage's revived !

[besmon11]

why these 4 hokage's revived when they was killed where they was sealed? Why?

 

[Khallil]

did you even read the chapter?

 

[Whitefang0908]

Re read the chapter again please. If u don't have time to read it then here it is:
Orochimaru used the shikagami ask to somewhat like control or command shikagami to cut its belly to unseal all that is sealed to it. So the 4 homages were revived.