Going into a game as 
I picked Revitalize thinking it'd increase my passive effectiveness, but to my surprise it didn't affect it in any way at all.
The rune clearly states it increases healing by 5% and increases that by an additional 10% when below 40% hp, while Volibear's passive makes it crystal clear that it heals him for 30% max hp.
Could we get some real clarification on what Revitalize actually works on?
Chembaron Yamada1 votesI guess he has the same problem like Dr. Mundo. His ultimate doesn't benefit from Revitalize, since it isn't coded as a heal, but as an increase of his health regeneration.
As far as I can see, it is probably the same for Volibears passive. Reading the description of both, they both state that Dr. Mundo/Volibear regenerate health.
The term healing is not used. So I think we should assume that every time when the ability says "regenerate", it is coded as health regeneration and doesn't benefit from Revitalize. But if the ability states "heal", it should work.
