A+ (F/GO rank-down)
Grendel Buster: Primal Conflict (源流闘争, Genryū Tōsō?) is the Noble Phantasm of Beowulf. It is the proof of his battle prowess, even after losing both his weapons in legend. Discarding his swords, he rushes towards the opponent to deliver a powerful punch, before unleashing a devastating barrage of kicks and punches, ending in a strike that smashes the enemy backwards.