The chill of the void made Loki uncomfortable. He hated this place. He never lingered longer than he needed to lest the monsters creep out from wherever they hid in the dark. Closing his eyes, he tried to calm his breathing and relax enough for the seidr in his core to replenish enough to get them to Midgard. It was while he was doing this that he felt rather than heard the shift in the atmosphere. Sif must have felt it also because he heard her unsheath her weapon a split second before his eyes snapped open.