Chrono Shard

You conjure a shard of temporal energy and launch it at a creature within range. Make a ranged spell attack against the target. On a hit, it takes 1d6 force damage, and its AC is reduced by 1 until the start of your next turn.

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