Enduring Tenacity [Duskmourn: House of Horror Prerelease Promos] EX6-056 Set: Modern Horizons Type: Enchantment

Set: Modern Horizons Type: Enchantment Rarity: Mythic Cost: {2}{G} Whenever you cast a permanent spell with a mana cost that contains {X}

Set: Assassin's Creed Type: Legendary Artifact — Equipment Rarity: Rare Cost: {12} This spell costs {X} less to cast

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If you reveal a creature card this way

Enduring Tenacity [Duskmourn: House of Horror Prerelease Promos] EX6-056 Set: Modern Horizons Type: EnchantmentSet: Duskmourn: House of Horror Prerelease Promos Type: Enchantment Creature Snake Rarity: Rare Cost: {2}{B}{B} Whenever you gain life, target opponent loses that much life. When Enduring Tenacity dies, if it was a creature, return it to the battlefield under its owner's control. It's an enchantment. (It's not a creature.)