Talk:Creator/@comment-168.181.181.151-20200523232755/@comment-5849797-20200524025712

I think you need to have Jotaro in your party (although I could be wrong about that). But you need to check a certain spot on the river and say "If I kill you, it's mine" in response to the person who comes out. After you win the fight (it's a pretty tough superboss, so be prepared), you'll get the axe.