RPGMemes

I only have the SRD available right now and that describes it as "a beam of crackling energy" but yeah, this is far too attractive a stylistic opportunity to not make use of it.

Besides, "crackling energy" is pretty broad already and leaves room for a variety of colors, sounds, and particle effects. Going from there to "magical 120ft tentacle that disappears after a second" isn't that much to ask for.