Wall of Serpents

You create a wall composed of a writhing mass of snakes. The wall appears within range and can rest of solid ground. You choose to make the wall up 30 feet long, 5 feet high, and 5 feet thick, and it vanishes when the spell ends. The wall may be a straight line or curve along the ground in any manner you wish, as long as each 5 foot segment of the wall is contiguous with at least other segment. The wall blocks movement, unless a creature can jump or fly over it. The wall does not block line of sight, but it does provide three-quarters cover against attacks that pass through it.

Any hostile creature that starts its turn within 5 feet of the wall must make a Strength or Dexterity saving throw. On a failure, the creature is grappled. The creature may use an action during its turn to repeat the saving throw to escape the grapple.

As an action, you can cause venomous vipers to bite any creatures you choose that are within 5 feet of the wall. A chosen creature must make a Constitution saving throw. On a failure, the creature takes 2d6 poison damage and is poisoned for as long as the spell remains active. On a success, the creature takes half damage.

As a bonus action, you may move the wall as if it were a creature. Each 5 foot segment may move up to 10 feet in any direction, as long as each segment remains contiguous with at least one other segment. The wall's movement is blocked by any creature or object that occupies a 5 foot square. Creatures grappled by the wall block the wall's movement and cannot be moved by it.

The wall counts as a single object with AC 10, 30 hit points, and immunity to poison damage. It can make saving throws against damaging effects using your spellcasting modifier for the roll. If it is destroyed, the spell ends.

At Higher Levels. When casting this spell at 4th level or higher, the wall's length increases by 10 feet, its hit points increase by 10, and the poison damage increases by 1d6 for each slot level above 3rd.