Wall of Corpses

You cause a violent eruption of undead from the ground creating a tightly stacked wall of rotting corpses and skeletons, on a solid surface, within range. You can make the wall up to 60 feet long, 20 feet high, and 2 feet thick, or a ringed wall up to 20 feet in diameter, 20 feet high, and 2 feet thick. The wall is impermeable but squirming and lasts for the duration. Coming within 10 feet of the wall and making a Wisdom (Perception) check (DC 15) is required to see anything on the other side.

When the wall appears, each creature within 5 feet of its surface must make a Dexterity saving throw. On a failed save, a creature takes 1d8 bludgeoning, piercing, and slashing damage each (3d8 total) and is grappled, with no damage or grappling occurring at that time on a successful save.

One side of the wall, selected by you when you cast this spell, has corpse arms and heads sticking out that are grasping, clawing, and biting.  The Wall of Corpses is bound together by earth covered roots and tangled body parts.  They seek to pull creatures in to their doom, to join the ranks of undead. Creatures coming within 5 feet of the wall must immediately roll a Dexterity saving throw (DC 15) or take 1d8 bludgeoning, piercing, and slashing damage each (3d8 total) and are grappled, on a successful save no damage or grappling occurs during that round. A creature muse repeat this saving throw at the beginning of any turn it starts within 5 feet of the wall.

Creatures killed by the Wall of Corpses join the wall permanently and their mangled corpse shows up in any future casting of this spell if their body is not freed before the Wall disappears.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the saving throw DC and all grapple check DCs increase by 3 for each slot level above 4th.