Blades of the Grave

You mutter a prayer in abyssal to a god of death and slam the thigh bone against the ground at your feet, erupting from the ground around you in a 50 foot radius sphere are 10 foot long blades of bone, all creatures within 50 foot must make a dexterity saving throw or take 6d10 piercing damage, taking half damage on a successful save.

At higher levels. When you cast this spell with a spell slot of sixth level or higher roll 2 additional d10 and extend the areas range by 10 foot.