Liquid Lightning

You prepare a deadly trap that will electrocute those who dare approach the water.

This spell functions as Water Shock, except as noted above and as follows. An effect similar to chain lightning strikes the first creature to touch the water, with secondary bolts striking all creatures within 60 feet. The creature that triggers the trap suffers 1d6 points of electricity damage per caster level (maximum 20d6) and is paralyzed for 1d6 minutes if it fails its Fortitude save. Secondary targets receive half damage and are not paralyzed.