This item was originally created by @Bonus_Action on Instagram! This is not my design in any way whatsoever.

Chalk One Up: As an action, you can use this chalk to draw a simple symbol. A creature using this chalk must have an intelligence of 8 to draw these symbols. You can draw p to 20 symbols with this chalk before it is completely used up.

Square: casts Fog Cloud (1st level), centered on the symbol. Only one square can be active at a time.
Circle: Creates up to a gallon of water in a container.
Triangle: Creates an Arcane Umbrella 10ft. above the symbol. It covers a 10t radius in which it stays dry from all natural rainfall.
Cross: Destroys up to a gallon of liquid from a container.