Use a Cut spell.

Shairi hissed a quick spell, and an invisible blade of magical energy sliced through the rope round her feet, dropping to the ground with a jarring thump.

“Stop her!” the elf woman shouted, and all three drew their bows. Shairi quickly cast another spell, filling the air with dust and shadows. Then she turned and ran into the forest, stumbling on the undergrowth as she tried to get away as fast as she could. Arrows thudded into the trees around her, and she knew if they had a clear shot at her she’d already be dead.

One whizzed by her cheek, grazing it. Another struck a glancing hit on her arm, leaving a deep gash. She winced, but staggered on.

Eventually, the shots stopped, and she realised she’d escaped the elves. Breathless, she slumped against a tree, and began to cast the spells that would seal her wounds and prevent scarring.

“Well, that could have gone better,” Queiss said when she caught up.

“Shut up,” Shairi snapped. Night had fallen, so she got shakily to her feet and conjured an orb of witchfire to light her way, looking for somewhere safe to sleep.