Mana Leak [Battle Royale] XY30 or by an opponent's card

or by an opponent's card effect while in its owner's Monster Zone: You can Special Summon 1 "D/D" monster from your Extra Deck or GY in Defense Position

Set: Rivals of Ixalan Type: Creature — Human Shaman Rarity: Rare Cost: {1}{R} Ascend (If you control ten or more permanents

If "Red Dragon Archfiend" is face-up on the field

Set: Mercadian Masques Type: Sorcery Rarity: Rare Cost: {X}{B}{B}{B} Destroy all creatures with mana value X or less

Mana Leak [Battle Royale] XY30 or by an opponent's cardSet: Battle Royale Type: Instant Rarity: Common Cost: {1}{U} Counter target spell unless its controller pays {3}. "The fatal flaw in every plan is the assumption that you know more than your enemy." Volrath