Animate Shadow

Choose a creature that you can see within range. The creature’s shadow animates and begins to haunt and torment it mercilessly until the spell ends. The creature takes 1d10 necrotic damage and the next attack made against it before the start of your next turn is made with advantage. A creature that makes a successful Wisdom saving throw takes half damage and does not grant advantage to attackers. While the spell lasts, you can use a magic action to animate the shadow of the same or a different creature you can see within range.

Using a Higher-Level Spell Slot. The damage increases by 1d10 for each spell slot level above 1st.