Coin of the Gods

The will of the gods is an unknown thing, but sometimes things are best left in their care. As you make the motion of tossing a coin to a creature you can see, you place what happens next in their hands.

When you cast this spell a willing creature that you can see will not roll a dice as they intended. Instead the DM will flip a coin (or D20 equivalent where 1-10 is tails and 11-20 is heads) If the coin is tails, the roll is counted as a Nat 1, if the coin is heads, the roll is counted as a Nat 20. The official flip/roll does not have to be revealed, only what happens.