"That would do it, most likely. Healing generally involves at least some transfer of energy or life from the healer to the healed." The origin of the powers didn't matter terribly, in Loki's view, but he'd gotten to know Liz more than well enough to know that she would keep worrying and fretting and what-if-ing, no matter how useless it was, unless she had an answer she could believe. "Is there anything happening besides sparks on your hands, fire, and small explosions?"