[Putting it in a cage is a good idea if it's actually impossible to kill without that sword. Steve doesn't think it's a solution so much slapping a band-aid on the problem, but at least people have been thinking about it.]

Got it. Well, I'll keep an eye out for anyone else tackling the problem. I'm not much of an architect, so I don't know about building any cage, but I should at least be able to protect people from it.

[The jabberwocky may be impenetrable, but so is Steve's shield.

As for cages, that one that had been built for the Hulk might also work in this case, but the people behind that construction aren't here. He'll ask Natasha about it all the same.]