Glaive Bounce

I know how to make the moon glaive bounce and hit however many targets I want and everything, but is there a way to make it do less damage after each bounce, similar to chain lightning? Ive tried changing area of effect damage (medium) and (small) but only (full) seems to do anything.

I'm not sure if this will do it becuase I didn't have the chance to try yet, but try using Damage Loss Factor, should be somewhere near the splash damage modifiers.