I assume that Stormbreaker would be smart enough to just Bifrost itself to Asgard, so for the purposes of this discussion we can leave it out of this.
I assume that Stormbreaker would be smart enough to just Bifrost itself to Asgard, so for the purposes of this discussion we can leave it out of this.
Exactly as long as the plot demands, plus a second or two to make it funnier.