Thunderous Smite

1st-Level Evocation
Casting Time: 1 bonus action
Range: Self
Components: V
Duration: 1 minute

As in the Player's Handbook except for the following changes:
At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage dealt by the attack increases by 1d6 for each slot level above 1st.

Source: PHB 282

Changelog