It was either a few minutes after he'd arrived or the battlefield or hours later, she couldn't tell. She did know that she'd managed to heal every one of the Aurors that had fallen, and the surge of pride she'd had at the realization was quickly smashed when, with an intricate flourish of his wand, Dumbledore called forth what amounted to a bloody tsunami from the nearby river. The Aurors and all of Grindelwald's forces scattered.