Kefnet the Mindful (Invocation) [Amonkhet Invocations] SM137 if your Spellcaster monster battles

if your Spellcaster monster battles an opponent's monster (Quick Effect): You can reveal any number of Spells with different names in your hand

As Sacred Foundry enters the battlefield

Set: Elemental Energy Card type: Fusion/Effect Monster Rarity: Ultimate Rare Attack: 2500 Defense: 2000 "Elemental Hero Flame Wingman" + "Elemental Hero Sparkman" This monster cannot be Special Summoned except by Fusion Summon

Set: The Dark Type: Enchantment Rarity: Rare Cost: {2}{R} Nonbasic lands are Mountains

Kefnet the Mindful (Invocation) [Amonkhet Invocations] SM137 if your Spellcaster monster battlesSet: Amonkhet Invocations Type: Legendary Creature God Rarity: Mythic Cost: {2}{U} Flying, indestructible Kefnet the Mindful can't attack or block unless you have seven or more cards in hand. {3}{U}: Draw a card, then you may return a land you control to its owner's hand.