You summon an invisible force that instantaneously hacks all grasses and underbrush to the ground, leaving nothing but an empty circle. Although the blades are invisible, they are not insubstantial. The swirling scythes and sickles deal 1d6 points of damage plus one point per caster level (up to +5) to any creature or inanimate object within the spell’s area of effect. Farmers use the spell to clear arable land for farming, although some use it to frighten neighboring farmers or to sabotage their crops. This spell has no effect on plants with CR ½ or higher.