Arms of Hadar

You invoke the power of Hadar the Dark
Hunger. Tendrils of dark energy erupt from
you and batter all creatures within 10 ft of you.
Each creature makes a Str save. On a failure, a
target takes 2d6 necrotic damage and can't take
reactions until its next turn. On a success, the
creature takes half damage, but suffers no other
effect.
At Higher Levels. Each extra spell slot increases
the damage by 1d6.