"Just as I do what is necessary for ours," Chrysalis said back. Her horn lit up in a sickly green colour, and she held up a small object that Twilight knew  had to have been pilfered out of her bags. It was the speaker stone, their sole method of contacting the other princesses, and of calling for aid. Chrysalis grinned, and with a flex of her magic, crushed it to near dust.