Undead Walls

In a 30-foot cylinder, each surface the spell area touches (walls, floors, ceilings, ect.) becomes a mass of zombie arms reaching and grabbing any creature within 5-feet of them. When a creature other than you starts their turn within 5-feet of a surface affected by the spell they must make a Dexterity or Strength saving throw taking 2d6 slashing damage and 2d6 necrotic damage whilst becoming grappled and restrained, taking half damage and resisting the grappled and restrained effect on a success. Restrained creatures may use their action to attempt an Athletics (Strength) check against your spell save DC, breaking out of the effect on a successful check.