Bolt of Darkness

In your hand you form a dark energy and launch it toward an enemy you can see within range. 

Make a ranged spell attack, on a hit you deal 3d6 cold damage and the target must make a Constitution Saving throw. On a failed save the target is incapacitated until the start of your next turn.

At higher levels: When you cast this spell using a spell slot of 3rd level or higher the damage increases by 1d6 for each slot level above 2nd