Talk:Riven/@comment-4964269-20130214001452/@comment-2124153-20130214003725

Means she snowballs less hard. You don't get as much Runic Blade damage early by getting a bunch of AD. Although with a 45% total AD bonus at max, instead of 15 + 50% of bonus AD.... Riven has 103.5 AD base at level 18, and the new passive is giving her 5% less of her bonus AD and losing the base 15, but you gain ~46 damage in compensation.

It's basically a buff to lategame Riven. Breakeven under the old system is about 620 AD, which you might notice is not really feasible. It should make it easier to recover from being behind, in theory, as well as improve the old snowball builds.

At least, if I understand the wording correctly. I have to check it out in-game.