Draining Bolt 2014

You sap the vitality of one creature you can see in range. Make a ranged spell attack against the target. On a hit, it takes 1d6 necrotic damage and has disadvantage on the next weapon attack roll it makes before the end of its next turn.

This spell's damage increases by 1d8 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).