Vermillion Vice

As an action, you can summon the forces of the earth, and lock one in place using the power of the stone below you. Choose a target of large or smaller you see in range, and force them to make a dexterity saving through. If they fail, The ground opens up beneath them, and seals them in a vice of green crystal. They are restrained, grappled, and they take 4d8 Bludgeoning Damage. On each Subsequent turn, you may use your action to crush the vice in further, dealing 3d6 damage. As an action, The target can make a Str save to try to break free. If they succeed, they are freed from the grapple, and are no longer restrained. If they Succeed the initial save, they take Half of 4d8, and are not grappled or restrained by the vice.