Touch of Dawn

Your fingertips take on a golden hue as you attempt to touch another creature. Make a melee spell attack against the target. on a hit, the target takes 3d8 radiant damage, and has disadvantage on its next attack roll before the end of its next turn. 

 At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot above 1st.