Proton Blast

Continuous Trap

Once per turn, if an activated card effect tosses coins, immediately after it resolves, apply the following effect(s), depending on the number of heads.
● 1+: Inflict 500 damage to your opponent.
● 2+: Destroy 1 card your opponent controls.
● 3+: Look at your opponent's hand and discard 1 card from their hand.
When an effect is activated that tosses a coin 2 or more times: You can banish this card from the GY; treat all results as heads.

Rulings – Yugipedia

Printings:

Legendary Duelists: Ancient Millennium: LED2-EN017 (Super Rare) - 2018-02-22
Legendary Duelists: Season 1: LDS1-EN079 (Common) - 2020-07-02

Prices:

Cardmarket: 0.16 €
TCGplayer: $ 0.21