Cordon of Arrows

Touch up to four nonmagical arrows, bolts, darts, or similar ammunition and plant them in your space. Whenever a creature other than you enters within 30 ft. of the ammunition for the first time on a turn or ends its turn there, one piece flies up to strike it. The creature must make a DEX save or take 2d4 piercing damage. You may designate creatures the effect ignores.