Eldritch Grasp

You conjure a mass of writhing tentacles from the void, reaching out to grasp and crush your enemies. Choose a point within range; tentacles erupt from the ground in a 20-foot square centered on that point. For the duration, these tentacles turn the ground in the area into difficult terrain.

When a creature enters the affected area for the first time on a turn or starts its turn there, it must succeed on a Dexterity saving throw or take 3d6 psychic damage and be restrained by the tentacles until the spell ends. A creature restrained by the tentacles can use its action to make a Strength check against your spell save DC. On a success, it frees itself.

While restrained by this spell, the creature has disadvantage on saving throws against being frightened and on attack rolls against creatures other than you. Additionally, if the creature starts its turn restrained, it takes an additional 1d6 psychic damage.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the initial damage increases by 1d6 for each slot level above 3rd.