Applaud

You applaud a creature for their combat skills, giving them renewed vigor. On their next successful weapon or spell attack within the duration that causes damage, they may deal an additional 2d10 of one of the damage types they dealt with that attack (their choice).

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the additional damage increases by 1d10 for each slot level above 1st.