The Eight Leaves One Blade (八葉一刀流) school is a swordsmanship style developed by Yun Ka-fai.
First Form: Helix
First Form, Helix (壱ノ型・螺旋). Cassius Bright mastered this form, earning him the title of Divine Blade. His signature S-Craft attack, Phoenix Wave, belongs to this form. Rotary motions are also prevalent in the swordsmanship of Maximillian Cid, Anelace Elfead and, although not considered a practitioner of the Eight Leaves school, Elise Schwarzer.
Second Form: Gale
Second Form, Gale (弐ノ型・疾風). Arios MacLaine mastered this form in a trial against Cassius Bright, earning him the title of Divine Blade of Wind. Both he and Rean Schwarzer use the crafts Gale and, Rean during Spirit Fusion, Arcane Gale and in Oni form, Oni Gale.
Arios' S-Crafts, Aeolus' Fury and Black Emperor, may be associated with Gale.
Third Form: Karmic Flame
Third Form, Karmic Flame (参ノ型・業炎). Rean Schwarzer's Flame Dragon and Flame Impact belong to this form. Both involve a downward slash and flames.
Fourth Form: Autumn Leaf
Fourth Form, Autumn Leaf (肆ノ型・紅葉). Rean Schwarzer uses this form with the craft Autumn Leaf Cutter.
Fifth Form: Morning Moon
Fifth Form, Morning Moon (伍ノ型・残月). Alan Richard's S-Craft, Sakura Morning Moon, directly references the form. His Luminous Wheel, Luminous Ogre Slash, Afterglow Smasher and True Luminous Divider are similar in execution and naming, and thus may also belong to this form. Rean utilizes this form while piloting Valimar as well.
Sixth Form: Scarlet Sky
Sixth Form, Scarlet Sky (陸ノ型・緋空). Very little is known about this form. Rean Schwarzer's True Arc Slash and Fatal Arc Slash may also belong to this form.
While piloting Valimar, Rean Schwarzer is capable of using the move Enlightened Domination (無想覇斬) and the move Clear Minded Spirit Unification (無想 神氣合) which is confirmed to belong to this form. As a practitioner of the seventh form, it can be assumed that Rean's S-Craft, Termination Slash - Dawn, may also belong to this form.
Eighth Form: Weaponless
Eight Form, Weaponless (捌ノ型・無手). While piloting Valimar without a weapon, Rean Schwarzer is capable of using the move Destructive Impact, which is associated with the eighth form. It is a form used when a practitioner is encountered with a situation that involves them not having their weapon on them or disarmed.