Auril's Flowers

This spell can't be cast on ground with no moisture in it. Each creature caught within range must make a dexterity saving throw.  On a failed save the target and take 3d6 piercing and 3d6 cold damage. On a successful save they take half damage. The Ground around the spell becomes difficult terrain

When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.