Unending and continuously scaling health as the game goes on...

Wait, for real? You sure this shouldnt be going in memes & games?

Stacking your health after laning phase is almost impossible. The rune is actually fun now.

If you are talking about overgrowth, it doesn't do that much. As a Sion main, it barely dents in what my W normally gives me. It helps yes, but .2% max health is nothing, I think the rune gave me no more than about 500 HP by the end of a 40 minute match.