Episode 10

"Knight of the Secret Stone! Fusion User 'Masumi Kōtsu'" (秘石の騎士！融合使い「光津真澄」 Hiseki no Kishi! Yūgō Tsukai "Kōtsu Masumi") is the tenth episode of the Yu-Gi-Oh! ARC-V anime.

Synopsis
The second match is a Duel between Yuzu and Masumi Kōtsu from the LDS's "Fusion Course". However, Yuzu has doubts over whether or not Yūya might have been behind the attack on Shingo or not, which causes her to hesitate and misplay during the Duel. And then this battle between Duel Schools reaches its conclusion in the third and final Duel.

Yuzu Hīragi vs. Masumi Kōtsu
At the start of the Duel, the Field Magic Card "Crystal Corridor" is activated, as per the rules of an Action Duel. It will allow the players to use Action Cards, but they may only have one in their hand at a time.

Turn 1: Masumi

Masumi activates "Gem-Knight Fusion", fusing the "Gem-Knight Emeral" and "Gem-Knight Roumaline" in her hand to Fusion Summon "Gem-Knight Paz" (CG Star 6/1800/1800) in Attack Position. Masumi Sets a card.

Turn 2: Yuzu

Yuzu draws "Prodigy Mozart the Melodious Maestra". As she controls no monsters, she activates "1st Movement Solo", letting her Special Summon a Level 4 or lower "Melodious" monster from her hand. She Special Summons "Aria the Melodious Diva" (CG Star 4/1600/1200) in Attack Position. As she controls a "Melodious" monster, Yuzu Special Summons "Sonata the Melodious Diva" (CG Star 3/1200/1000) from her hand in Attack Position via its own effect. She Releases "Aria" and "Sonata" to Advance Summon "Prodigy Mozart the Melodious Maestra" (CG Star 8/2600/2000) in Attack Position. Yuzu activates the effect of "Prodigy Mozart the Melodious Maestra", letting her Special Summon a "Melodious" monster from her hand. She Special Summons "Canon the Melodious Diva" (CG Star 4/1400/2000) in Attack Position. "Prodigy Mozart the Melodious Maestra" attacks and destroys "Paz" (Masumi: 4000 → 3200 LP). "Canon" attacks directly (Masumi: 3200 → 1800 LP). Yuzu activates the effect of "Canon", switching it to Defense Position.

Turn 3: Masumi

Masumi draws "Gem-Knight Alexand" and subsequently Normal Summons it (CG Star 4/1800/1200). She activates the effect of "Alexand", allowing her to Release it to Special Summon a "Gem-Knight" Normal Monster from her Deck. She Special Summons "Gem-Knight Crysta" (CG Star 7/2450/1950) in Attack Position. Masumi activates her face-down "Doublet Fusion", letting her banish Fusion Material Monsters listed on a "Gem-Knight" Fusion Monster, and then Fusion Summon that monster, but it will be destroyed during the End Phase. She banishes "Alexand", "Emeral", and "Roumaline" to Fusion Summon "Gem-Knight Master Dia" (CG Star 9/2900/2500) in Attack Position. She activates the effect of "Master Dia", letting her banish a Level 7 or lower "Gem-Knight" Fusion Monster from her Graveyard to have "Master Dia" gain its name and effects. She banishes "Paz". "Crysta" attacks and destroys "Canon". "Master Dia" attacks and destroys "Prodigy Mozart the Melodious Maestra" (Yuzu: 4000 → 3700 LP). Due to the inherited effect of "Paz", Yuzu takes damage equal to the ATK of the destroyed monster (Yuzu: 3700 → 1100 LP). Due to the other inherited effect of "Paz", "Master Dia" can make a second attack. Yuzu attempts to find and activate an Action Card, but it ends up being the reflection of a card behind her. "Master Dia" attacks directly (Yuzu: 1100 → 0 LP).

At the start of the Duel, the Field Magic Card "Sword's Graveyard" is activated, as per the rules of an Action Duel. It will allow the players to use Action Cards, but they may only have one in their hand at a time.

Noboru Gongenzaka vs. Yaiba Tōdō
Turn 1: Gongenzaka

Gongenzaka Normal Summons "Superheavy Samurai Kabuto" (CG Star 4/1000/2000).

Turn 2: Yaiba

Yaiba draws "XX-Saber Fulhelmknight". He Normal Summons "XX-Saber Boggart Knight" (CG Star 4/1900/1000). As it was Normal Summoned, its effect activates, letting Yaiba Special Summon a Level 4 or lower "X-Saber" monster from his hand. He Special Summons "Fulhelmknight" (CG Star 3/1300/1000) in Attack Position. As the opponent Special Summoned a monster, Gongenzaka activates the effect of "Kabuto", switching it to Defense Position and increasing its DEF by 500 ("Kabuto": 1000/2000 → 2500) until the end of this turn. As he controls two or more "X-Saber" monsters, Yaiba Special Summons "XX-Saber Faultroll" (CG Star 6/2400/1800) from his hand in Attack Position via its own effect. Yaiba tunes the Level 4 "Boggart Knight" with the Level 3 Tuner monster "Fulhelmknight" to Synchro Summon "X-Saber Souza" (CG Star 7/2500/1600) in Attack Position. Yaiba then activates the effect of "Faultroll", allowing him to Special Summon a Level 4 or lower "X-Saber" monster from the Graveyard once per turn. He Special Summons "Fulhelmknight" (CG Star 3/1300/1000). He then tunes the Level 6 "Faultroll" with the Level 3 Tuner monster "Fulhelmknight" to Synchro Summon "XX-Saber Gatmuz" (CG Star 9/3100/2600) in Attack Position.

Duel continues in the next episode.

List of Featured Characters

 * Yūya Sakaki
 * Tatsuya Yamashiro
 * Futoshi Harada
 * Ayu Ayukawa
 * Noboru Gongenzaka
 * Yuzu Hīragi
 * Himika Akaba
 * Hokuto Shijima
 * Masumi Kōtsu
 * Sora Shiun'in
 * Yaiba Tōdō
 * Shūzō Hīragi
 * Reiji Akaba