Well, this is an interesting sight.

[Because the Dark One can of course see spirits, regardless of what they actually do. He peers at the little golden man with visible curiosity.]

And who might you be?

You are... a dreamer?

[He's not quite making the connection to "Sandman", though he will before too long, especially once he realizes that golden stuff is sand. This is just his first guess.]

And apparently you do not speak?

[Rumple is more interested in that golden stuff than he is what Sandy is actually trying to say, which is probably less of a problem than it otherwise could be. Still, he picks up enough to guess:]

You craft dreams. How interesting... what is that you're... crafting with...?

[And then, then it hits him. He looks skeptical, but what else could it be?]

Don't tell me. The sandman...?

[Yeah, Rumple is giving Sandy's enthusiasm an unimpressed look, but he can't quite get over his curiosity, so. He's still.]

So you actually exist, in some world out there. It must not be one I'm familiar with. And that sand of yours-- it's magical?

[He can't quite disguise his intent interest in that. Not that he's trying very hard.]

[He sniffs at that look.]

Merely verifying. So you also know Jack Frost, I take it. From the same world, are we?

[Very interesting, indeed.]

[Sorry, Sandy. Rumple's just not a very nice person in general. This is polite, for him.]

Then perhaps he can do some translating for you, at some point, if you have something more specific to say. Though there may also be alphanumeric keys on your communicator, if you are capable of writing.

[Rumple can't help it. He snickers.]

Something like that. I see there will be a learning curve here.

[That only earns him a slightly more good-natured chuckle. Only slightly.]

You'll get there eventually, I'm sure.

[Sensing he's done being communicated with, and okay with that today, Rumple ends with a slightly mocking:]

Good luck.

[Then he disconnects. Sorry, Sandy. You got the resident jerk.]