He coexists with the inhabitants of Dominaria in the games mainline story, but hes just very, very old

"Alligator's Sword" "Ancient Gear Gadjiltron Dragon" "Armed Dragon LV10" "Armityle the Chaos Phantom" "Baby Dragon" "Barrel Dragon" "Blue-Eyes Shining Dragon" "Blue-Eyes Toon Dragon" "Blue-Eyes Ultimate Dragon" "Blue-Eyes White Dragon" "Celtic Guardian" "Chimeratech Overdragon" "Curse of Dragon" "Cyber Blader" "Cyber End Dragon" "Cyber Harpie Lady" "Cyber-Tech Alligator" "Cyberdark Dragon" "Dark Magician" "Dark Magician (Arkana)" "Dark Magician Girl" "Dark Necrofear" "Dark Paladin" "Dark Ruler Vandalgyon" "Destiny Hero - Dogma" "Destiny Hero - Plasma" "Elemental Hero Neos" "Elemental Hero Shining Flare Wingman" "Elemental Hero Terra Firma" "Embodiment of Apophis" "Exodia Necross" "Exodius the Ultimate Forbidden Lord" "Gilford the Lightning" "Great Shogun Shien" "Hamon, Lord of Striking Thunder" "Harpie Lady" "Horus the Black Flame Dragon LV8" "Infernal Dragon" "Insect Queen" "Jinzo" "La Jinn the Mystical Genie of the Lamp" "Lava Golem" "Light and Darkness Dragon" "Magician's Valkyria" "Mystical Beast of Serket" "Obelisk the Tormentor" "Obnoxious Celtic Guard" "Rainbow Dragon" "Raviel, Lord of Phantasms" "Red-Eyes B

Getting a Treasure token wont make up for a significant mana disadvantage, nor would 4 life in many situations
Decrease the level of all "Zodiac Dragon" Monsters in your hand by 1
(Ceci est trait comme une Invocation Xyz.) Le tour o vous activez cet effet, vous ne pouvez pas Invoquer Spcialement de monstres (monstres Xyz exclus) depuis l'Extra Deck, et aussi, vos autres monstres ne peuvent pas attaquer directement
Failing that, his second loyalty ability still generates 5/5 Demon creature tokens