She calculated quickly. She'd never tried over such a distance, when her enemies had usually been right in front of her on the battlefield. Mercury considered the already-existing fog; it should be easy for her to manipulate that, thickening it and growing it. And the closer she got to believing she could do it, the more she wanted to try.

She nodded. "I can do it," she said simply. She wondered what the Covenant would make of that, their enemy calling up the very mists and waters against them as if the land itself were taking a side. Her mouth spread into an unpleasant smile for her enemies at the thought.

"Shall I go ahead?"