I was testing this out a few days ago on kakashi clones, not really the best way to go at it. IIRC, it boosts all ninjas with lightning attribute by 20% and not just cee, because then cee would be really tanky. Then again I was doing this with Kakashi clones and I was also dead tired... Also my equips kept getting shuffled around from me moving my characters, so don't assume that I am correct but instead just think about it I guess.