White Chalk +

As an action, you may draw one symbol on a
creature or surface, which lasts for one minute.
The chalk has 15 total uses before crumbling.
Square : Resistance to bludgeoning damage.
Cross : Resistance to slashing damage.
Triangle : Resistance to piercing damage.
Circle: +1 Armor Class
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1