[He... has absolutely no idea who this Goten fellow is, but that isn't terribly important to learning about this cloud thing.]

That's kind of weird. [He doesn't sound like he's weirded out by it at all, however.] But, I guess there a bunch of things here that seem pretty weird. ['A magic cloud' sounds fairly tame in a world of gods and people-weapons, honestly.]

You can just summon it whenever you want, then?