"Expecto Patronum," she said, pulling at the dregs of her magic reserves. She was more than half-expecting to feel the same minimal response from her magic as she'd felt when she'd previously attempted even a simple spell. Instead, a steady stream of magic rose within her and flowed through her wand. If it felt more taxing than she was used to then she couldn't complain. The mist coalesced into an otter, waiting for orders.