hiruzen. he can use death reaper seal. hidan being edo or "alive" makes no difference
But doesn't that mean Hiruzen dies too if he uses death reaper seal?
Also, I almost thought there was no difference too but there is one difference. Hidan can regenerate his body after being exploded to pieces in Edo mode but he can't in normal mode.
I still think Hiruzen rapes though.
Draw. Hiruzen can't kill Hidan nor an Edo so how does he kill Hidan as an Edo. He uses the rds and seals himself along with Hidan.