Thelonious Viper (GX) Signature Cards Idea:

• at least 32 cards first released after Goat's card pool closed (2005-08-20): Ambush Fangs, Attack Pheromones, Black Mamba, Damage = Reptile, Evil Dragon Ananta, Hydra Viper, Lamia, Lightserpent, Loud Cloud the Storm Serpent, Molting Escape, Night Sword Serpent, Offering to the Snake Deity, Poisonous Viper, Reptia Egg, Rise of the Snake Deity, Silent Abyss, Snake Deity's Command, Snake Rain, Snake Whistle, Terrene Toothed Tsuchinoko, Urubonus, the Avatar of Malice, Vennominaga the Deity of Poisonous Snakes, Vennominon the King of Poisonous Snakes, Venom Boa, Venom Burn, Venom Cobra, Venom Serpent, Venom Shot, Venom Snake, Venom Swamp, Viper's Grudge, Wicked Acolyte Chilam Sabak

Checked against the Goat format Forbidden & Limited list (April 2005) as of 1 October 2026 and its card pool (no card first released after 20 August 2005), with the sizes and copy limits of a Anime deck.