THUNDEROUS BLADE

Evocation cantrip

Casting Time: 2 actions
Components: S, M (a weapon)
Duration: 1 round
Range: Self

You take the Attack action as part of the same action used to cast this spell against a creature within reach using the weapon provided as a material component. On a hit, you can cause the target to take thunder damage equal to your spellcasting ability modifier, and again when it takes the Move action before the start of your next turn, plus an additional 1d8 thunder damage at level 5 (1d8), 11 (2d8), and 17 (3d8) each time.