Sky Blue Runechalk

Uncommon Wondrous Item

Chalk One Up. As an action you can use this chalk to draw a simple symbol. A creature using this chalk 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 completely used up.
Square. Casts the spell Alarm, the 20ft. cube is centered on the symbol.
Circle. Casts the spell Purify Food and Drink, centered on the symbol.
Triangle. Casts the cantrip Mending on the item you draw the symbol on.
Cross. Instantly locks a mechanical lock on a door or a chest once.