Stormbreaker

*Note: I added a sharper ax head that you can attach. There are no details though, so it may need work

I would use PVC pipe (with heat gun to warp) or a wooden rod as the handle and some rope as Groot's wrap around the top. Check out Odin makes Stormbreaker on youtube for more ideas.

Article written on this print by Clinton Matos here: https://www.htxt.co.za/2018/07/30/3d-printing-thors-stormbreaker-is-a-much-easier-way-to-make-it/

(If your going to print this...aim for the head)