Again, great idea. And I was thinking there were something not quite right about the Knowledge (arcana) requirements. Knowing about magic is one thing, but these are active tweakings that are made on magical weapons. Use Magic Device is perfect for this. I think I will change all Knowledge (arcana) requirements to Use Magic Device.

Hmm...

Arc Lightning
Combining your exceptional skill with your magical weapon, you can create chains of lightning which can rival that of a mage.

Prerequisites: Cleave, Great Cleave, Spellcraft 8 ranks, Use Magic Device 8 ranks

Benefit: When cleaving in battle with a shock or shocking burst weapon, you can carry the total electrical damage that you dealt to your last target onto your new target. A Spellcraft check of DC 12 is required to do so. While this effect is cumulative, each such usage furthers the DC by 2.


I have the feeling that the wording isn't so clear. Does it require further explanation? Or is it overpowered?