Bolstering Strike

You attack your foe without mercy or reprieve, and your accuracy is rewarded with a divine gift of vigor. The next time you hit a creature with a melee weapon attack during the spell’s duration, you deal a extra 2D6+CHA modifier Radiant Damage, and you gain temporary hit points equal to your CHA modifier. Temp hit points do not stack but do reset every time you successfully use this spell. 

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the initial extra damage dealt by the attack increases by 1d6 for each slot.