Flip 3 coins. If 1 of them is heads, this attack does 10 damage plus 10 more damage. If 2 of them are heads, this attack does 10 damage plus 20 more damage. If all of them are heads, this attack does 10 damage plus 40 more damage.
Disclaimer: The following data is based on sale history from a third party source. Data is updated about every 5 days. This data does not serve as a value guarantee.