Spike Growth

Action | 150 ft | V/S/M | Concentration, 10 min

The ground in a 20-foot-radius Sphere on a point within range sprouts hard spikes/thorns. The area is Difficult Terrain for the duration. When a creature moves into or within the area, it takes 2d4 Piercing damage for every 5 feet it travels.
The transformation of the ground is camouflaged to look natural. Any creature that can't see the area when the spell is cast must take an action and make a Wisdom (Perception/Survival) check against your spel