Cardfight!! Vanguard TCG - Seeker, Hallowed Breath Dragon (BT16/068EN) - Booster Set 16: Legion of Dragons & Blades ver.E A single individual card from the Cardfight!! Vanguard trading and collectible card game (TCG/CCG). This is of C rarity. From the Booster Set 16: Legion of Dragons & Blades ver.E set.