Reign-Beaux, Overlord of Dark World [STON-EN017] Ultra Rare 10a Leviathan can't attack unless you

Leviathan can't attack unless you sacrifice two Islands

Set: Odyssey Type: Creature — Dwarf Rarity: Uncommon Cost: {2}{R} When Dwarven Recruiter enters the battlefield

Set: Mirage Type: Legendary Creature — Serpent Rarity: Rare Cost: {3}{U}{U} Trample

you can negate the activation and effect of any Spell Cards and destroy them

Reign-Beaux, Overlord of Dark World [STON-EN017] Ultra Rare 10a Leviathan can't attack unless youSet: Strike of Neos Card type: Effect Monster Rarity: Ultra Rare Attack: 2500 Defense: 1800 If this card is discarded from the hand to the Graveyard by an opponent's card effect, Special Summon this card. If this card is Special Summon this way, destroy all monster OR all Spell and Trap Cards your opponent controls.