Board Thread:Versus Debates/@comment-26704954-20160301064038/@comment-3965545-20160305045817

So even at 59 Hiruzen was obviously a beast. His knowledge and versatility are dangerous.

@MIG Orochimaru did say that, Hiruzen could use all hiden jutsu and all other jutsu in the leaf. I guess he just doesn't have the chakra reserves anymore since he was old.