That's your universe designation, every Earth has one. You learn that fast when you're an interdimensional woman of mischief. Ours is Earth-616. Have you ever been to Earth-212? Ah, no, of course not. Anyway, they sell the best Korean barbecue!

[ Tapping a nail on his faceplate where his nose should be, Loki smiles broadly. ]

I've been to your world.