The Seal of Orichalcos [MAMA-EN111] Secret Pharaoh's Rare RC5 Set: Gym Challenge Unlimited Type:

Set: Gym Challenge Unlimited Type: Water Rarity: Holo Rare Retreat cost: Colorless

or Effect Monster's effect and destroy all cards your opponent controls

two psycannons

The same is true for creature spells you control and creature cards you own that aren't on the battlefield

The Seal of Orichalcos [MAMA-EN111] Secret Pharaoh's Rare RC5 Set: Gym Challenge Unlimited Type:Set: Magnificent Mavens Card type: Field Spell Rarity: Secret Pharaoh's Rare All monsters you control gain 500 ATK. Once per turn, this card cannot be destroyed by card effects. While you control 2 or more face up Attack Position monsters, your opponent cannot target your monster(s) with the lowest ATK for an attack. If this card is activated: Destroy all Special Summoned monsters you control. You cannot Special Summon monsters from the Extra Deck.