Toz and Lucy might have relaxed just a moment too early. As soon as they sighed in relief, the ground started trembling. It was only light trembling, and the two of them didn't feel any danger, so they decided to take a careful peek and see what was causing the shaking.
But their vision was quickly impeded by the billowing fog. The barrier holding it back had disappeared, and with nothing stopping it, the fog surged inwards, drawn towards the white orb.
But the fog didn't stop at the place where Toz had last seen the orb. It disappeared into the tunnel with incredible speed. Despite how quickly the fog was devoured by the tunnel, it still took several moments for it to clear enough for Toz, Lucy, and the other cats that had left the familiar space, to see their surroundings.