The Snow Fairy (雪の妖精, Yuki no Yōsei) is the twenty first volume of the Accel World light novel series by Reki Kawahara. It was released on December 10, 2016 in Japan. This volume's subtitle is translated as The Snow Sprite by Yen Press.
In the Unlimited Neutral Field, members of the new Black Legion fall victim to a surprise attack at the hands of Orchid Oracle, a Burst Linker long considered lost to Brain Burst. Thinking quickly, Silver Crow retreats to the Highest Level with Metatron in an attempt to grasp hold of the situation, but there they are greeted by a brand-new adversary! Snow Fairy, an F-Type avatar of the White Legion unleashes her devastating attack and severs the link between them! It's up to Kuroyukihime and Niko to save their Legion members!