The Dreaded Mucell

Flit recovers a Vagan intact cockpit from their previous battle and Dique's team finds that its pilot was using a special helmet to artificially stimulate his X-Rounder abilities. Against orders, Asemu steals the helmet believing it would give him the chance to get on par with Zeheart's skills, but the side effects of wearing it in combat puts his life in…

Synopsis excerpt via Kitsu.