Water and Earth
This spell persuades the Water kami and Earth kami in the area of effect to mingle, instantly reducing the ground to sticky, nigh-impassable mud. The spell can be cast anywhere where the ground is normal earth or even stone, but cannot be cast on a finished surface such as a tiled or wooden floor. For the duration of the spell, anyone attempting to physically move through the area of effect can only move a number of feet equal to their Water Ring with a Simple Action, and cannot move at all with a Free Action.