Briar Web

Thorny plants sprout from the ground in a 40-foot radius, starting from a point within range. For the duration, these plants turn the ground in the area into difficult terrain. A creature takes 1d4 piercing damage when it enters the area and for every 5 feet it travels through the area. 

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the piercing damage increases by 1d4 for each spell slot above 2nd.