Witch Slap

You infuse your hand with a crackling, roiling energy that magnetizes to living creatures. Make a melee spell attack against a creature within range. On a hit, the target takes 2d8 thunder damage, and on each of your turns for the duration, you can use your action to repeat the spell attack against the target with advantage. The spell ends early if the attack misses, or if you use your action to do anything else.

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