As an action you can use the chalk to draw a simple symbol. A creature must have at least an intelligence of 6 to draw these symbols. you can draw up to 20 symbols with this chalk before it is used up.

Square - Fills a container with 1 pint of your favorite ale.

Circle - Casts the light cantrip on the object it is drawn on.

Triangle - Fills a container with 1 pint of lamp oil.

Cross - Casts the Grease spell when a creature crosses the symbol. Lasts for 8 hours maximum, the DC for this spell is 12, a maximum of 3 cross symbols can be active at a time for this chalk.