And move, Walden did. Survival was what he did best and standing still in a fight like this one rarely aided that survival.
Disappointed in the lack of hits and governed by the consternation of having his own spells come back on him, he hurled a few more spells in her direction. But, he didn't stay where he was long enough to see if they hit. Her shields were annoying him and taking the fun out of his play, which meant Walden was tired of playing and ready to just kill the bitch.
The Anti-Apparition jinx was localised over the shop that had been their target and that meant there was nothing to stop him from blinking out of existence before she could return fire.
He reappeared behind her, no longer in a mood to play, wand aimed at her back. "Crucio."