Wall of Water (Revised)

You create a wall of water on the ground at a point you can see within range. You can make a linear wall up to 30 feet long, 10 feet high, and 1 foot thick, a domed wall up to 15 feet in radius and 1 foot thick, or a ringed wall up to 20 feet in diameter, 20 feet high, and 1 foot thick. The wall vanishes when the spell ends. The water making up the wall churns violently; creatures must expend 3 times the normal movement speed and attacks require 3 times the normal range while passing through the wall's space, the wall provides targets half cover from effects that would pass through it, and sources of acid, fire, or poison damage that pass through the wall deal half damage.

Spells that deal cold damage that pass through the wall cause the area of the wall they pass through to freeze solid (at least a Tiny-sized space). Each frozen section has AC 5 and hit points equal to 3 times the side length of the section's cubic space (round down, minimum 7). Reducing a frozen section to 0 hit points destroys it; when a section is destroyed, the wall’s water doesn’t automatically fill it.

While you are concentrating on this spell, you can use an action to reshape the wall into another of its formats, create an opening in it no smaller than Tiny-sized and no larger than Large-sized, or melt a frozen section of it back into water, and you can use a bonus action to close up to a Medium-sized opening in the wall. 

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the hit point modifier (3) increases by 1, the length of the linear wall and the radius of the domed and ringed wall increase by 5 feet for each slot level above 3rd.