Toss a magic infused coin to a spot within 10ft of you, which lingers in the air until the end of your next turn.
While the coin is in the air, you or your allies can use the coin when making a ranged spell or weapon attack, as long as line of sight can be drawn from the attacker to the coin and from the coin to the target and as long as the coin is within range of the attacker and the target within range of the coin.
If the attack hits, it automatically becomes a critical hit, as the shot ricochets off the coin and hits a weak spot. This destroys the coin.
If the coin has not been used when the spell's duration ends, it becomes nonmagical and falls to the ground.