This is a path-based lightning system that uses some self-contained scripts to create fantastic looking lightning and laser effects.
The demo project shows various different usages of these scripts and the different effects that can be achieved from very minor tweaks to the input values.
You can download the demo project for testing before you buy here: http://bit.ly/tentaclesdemo
NOTE: This currently does not work on the HTML5/JS targets, but is fine on all the rest. It should work with WebGL enabled, so I am investigating if this is a bug or not and will update if it can be fixed.