Go no Ken

Gō no Ken (南斗聖拳 Fist of Strength) is a style of Hokuto Shinken created by Raoh. As the name implies, it uses immense power to overwhelm its opponents, and can also be used to augment the fighter's own strength. Toki was able to harness this style, contrasting with his soft style, because of his blood ties with Raoh.