Turbid Tide

You fill a 20 ft. radius with silt and algae, decreasing visibility as murk. In addition, the heavy silt congeals the water, making it thick, heavy, and hard to move through. Ranged Attacks are useless within turbid tide and creatures attacking in melee take an additional -2 penalty to attack and damage rolls. The area also counts as difficult terrain for the duration of the spell. Unless murk, a turbid tide's duration is not reduced by natural or magical currents in the area.