"You're invisible. I can't see you."

Sloan... Your powers are derived from sight, isn't that true? I overheard you tell the others about your wish. You healed your sister's blindness. You can heal the eyes of others... Is it so hard for you to use your power to see the invisible? Especially now that you're so strong... it'll be easy for you to overpower my abilities with your own...

That made sense, Sloan guessed. Like the photography thing, she had never even thought to use her powers in such a way, but at least this time she had the excuse of lack of application. The only invisible person she had ever met was Omaha, and the issue of using your power to directly counter another girl's power basically became an arm wrestling contest.

She focused on the empty space in the snow where Omaha's blood ran. See the invisible. Like Superman. X-Ray vision. The more she thought about it, the more she wondered why she had never even considered it back when Omaha was tailing them around Williston. Of course, back then Sloan's strength was at its lowest point.

With unexpected ease, Omaha popped into view. Sloan almost thought the girl had done it herself, but a faint shadowy aura pervaded around her, much the way things looked on those occasions Omaha made Sloan disappear. Her outfit shimmered with the dampness of her blood, some of it frozen into icy chunks. She trembled in the snow like a twittering machine, something about to go off the fritz and burst in a conniption of gears and springs.

"That was easy."

(Chapter 22)