Player's Handbook

Divine Strike

0-level (Cantrip) Evocation

At 8th level, you gain the ability to infuse your weapon strikes with divine energy. Once on each of your turns when you hit a creature with a weapon attack, you can cause the attack to deal an extra 1d8 damage of the same type dealt by the weapon to the target.
At higher levels: When you reach 14th level, the extra damage increases to 2d8.