Royal Purple Runechalk

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 10 to draw these symbols. Effects last for one hour. Identical symbols do not have a stacking effect. You can draw up to 20 symbols with this chalk before it is completely used up.   Shield. (drawn on shield) You have an +1 bonus to your AC while using this shield on top of the regular ac this shield grants you.   Hammer. (drawn on armor) Grants resistance against Bludgeoning damage.   Arrowhead. (drawn on armor) Grants resistance against Piercing damage.   Crescent Moon. (drawn on armor) Grants resistance against Slashing damage.