Brushed Wall

You flick the paintbrush toward a flat, non-living surface within range. A line of thick paint shoots from the brush and forms a physical barrier on that surface, looking like a hyper-realistic painting of a stone wall, iron door, or wooden palisade.

The barricade is up to 30 feet long, 10 feet high, and 1 foot thick. It provides total cover. The barricade has an AC of 15 and 30 hit points. It is immune to poison and psychic damage, but it is vulnerable to water; a gallon of water or a spell like Create or Destroy Water splashed on it deals 10 acid damage and forces it to make a Constitution saving throw or lose 5 hit points as the paint runs.