Cardfight!! Vanguard - 4x18 - Season 4, Episode 18- Followmy.tv

Although Naoki deals 5 damage to Serra while destroying his rear-guards, Serra performs Legion and replenishes his forces on the following turn. Serra also reveals to everyone that Aichi was the one who wanted him along with Gaillard, Neve, and Rati to become Quatre Knights. Naoki wonders why Aichi would do all of this and then remembers his training with Leon. Naoki performs Legion and again attacks and retires all of Serra's rear-guards while empowering his own units, leading to his victory. While in disbelief over this loss, Serra faces Judgment from the fight field and loses consciousness. Having sensed Serra's defeat, the other Quatre Knights prepare to face Kai and his friends in battle.