Time Wizard (LDK2-ENJ15) - Legendary Decks II (2024 Reprint) Unlimited

Once per turn: You can toss a coin and call it. If you call it right, destroy all monsters your opponent controls. If you call it wrong, destroy as many monsters you control as possible, and if you do, you take damage equal to half the total ATK those destroyed monsters had on the field.
(Disclaimer: This card features a 2020 Copyright date.)