Truelight's Time Knife

You create a clock hand and fling it at one creature within range. Make a ranged spell attack against the target. On a hit, the target takes 1d10 Force damage. Additionally, their next d20 roll is at disadvantage as they are too absorbed questioning their decisions that led them to this moment.
Hit or miss, the hand then explodes. The target and each creature within 10 feet of it must succeed on a Dexterity saving throw or take 2d6 Force damage.

Using a Higher-Level Spell Slot. The second Force damage increases by 1d6 for each spell slot level above 2.