Spike Growth

Cast Time: 1 Action| Range: 150 ft| Concentration
Mats:V,S,M(sharp thorns)| Duration: 10 Minutes
The ground in a 20 ft radius centered within
range twists and sprouts large thorns. The area
becomes difficult terrain for the duration. A
creature moving into or within the area takes 2d4
piercing damage per 5 ft of travel. The thorns are
camouflaged to look natural. Creatures that can't
see the area during casting make a Perception
check against your spell DC to notice the thorns.