Void Appendage

You cause a tremor in the ground within sight. any creature standing on this tile must make a Dexterity saving throw. On a failed save, a Void Tentacle appears from the ground dealing 1d4 bludgeoning damage. the spell ends once a Void Tentacle is summoned

On level 5 on a failed dexterity saving throw deal 2d4 bludgeoning damage and summon two void tentacles

On level 7 on a failed dexterity saving throw deal 3d4 bludgeoning damage and summon four void tentacles