Eight Leaves One Blade

The Eight Leaves One Blade school is a swordsmanship style developed by Yun Ka-fai.

First Form: Helix
First Form, Helix (壱ノ型・). 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・). Arios MacLaine mastered this form in a trial against Cassius Bright, earning him the title of Divine Blade. Both he and Rean Schwarzer use the crafts Gale and Arcane Gale, with Rean initially only performing it during Spirit Unification before doing so in his base form in Cold Steel IV. In Demon Unchained state, Rean uses Infernal Gale.

Arios's S-Crafts, Aeolus' Fury and Black Emperor, may be associated with Gale.

Third Form: Karmic Flame
Third Form, Karmic Flame (参ノ型・). Rean Schwarzer's Flame Dragon and Flame Impact may belong to this form. Both involve a downward slash and flames. Not much is known about this form.

Fourth Form: Autumn Leaf
Fourth Form, Autumn Leaf (肆ノ型・). Rean Schwarzer uses this form with the craft Autumn Leaf Cutter. Not much is known about this form.

Fifth Form: Morning Moon
Fifth Form, Morning Moon  (伍ノ型・). Alan Richard is a practitioner of this form. Rean also utilizes this form as a defensive countering stance while piloting Valimar as well. It is noted that Morning Moon focuses heavily on iaijutsu (sword drawing techniques).

Sixth Form: Scarlet Sky
Sixth Form, Scarlet Sky (陸ノ型・). Rean Schwarzer's Arc Slash may belong to this form, while Crimson Slash is stated to be a technique from this form. Both involve a slash-shaped projectile. Not much else is known about this form.

Seventh Form: Void
Seventh Form, Void (漆ノ型・). Cassius Bright learned this form from Yun Ka-fai, though it is unclear to what extent he mastered it. Rean Schwarzer mastered this form in a trial against Cassius Bright, earning him the title of Divine Blade. While piloting Valimar, Rean Schwarzer is capable of using Enlightened Domination, along with Enlightened Spirit Unification (無想神氣合一), which are both confirmed to belong to this form. Rean Schwarzer's S-Craft, Termination Slash - Dawn, may be associated with this form, while his S-Crafts Breaking Dawn and Luminous Abyss are definitely associated with this form.

Eighth Form: Weaponless
Eight Form, Weaponless (捌ノ型・). While piloting Valimar without a weapon, Rean Schwarzer is capable of using the move, Destructive Impact, which is a move associated with the eighth form. It is a form used when a practitioner encounters a situation which involves them not having their weapon on them or disarmed.

Zeroth Form: Twin Shadows
Zeroth Form, Twin Shadows. Used by Shizuna Rem Misurugi; other than that, virtually nothing is known about this form. It may be what is known as the Black God One Blade.

Known practitioners

 * Yun Ka-fai (founder), the Sword Hermit
 * Cassius Bright, Divine Blade (title unknown)
 * Arios MacLaine, the Divine Blade of Wind
 * Rean Schwarzer, Divine Blade (title undecided)
 * Shizuna Rem Misurugi, Divine Blade of Silver
 * Anelace Elfead
 * Alan Richard

The Ikaruga mercenary group draws from a number of martial arts schools, among them the Eight Leaves.

Trivia

 * In Rean's mastered S-Craft, the beginning is a reference to a Kendo philosophical quote: Meikyo-Shisui, "Clear mirror, Still water", shown with clearing his mind and the reflection on the water.