Board Thread:Versus Debates/@comment-26704954-20160301064038/@comment-3965545-20160307082134

Its only infinite refills.. and it isn't instant either as Minato, Tobirama and Hashirama each said they were low on chakra, and out of chakra. So once they run out of chakra, THEN it refills as an Edo Tensei. In fact once Madara took Hashirama's chakra he took forever to refill it.