Just played dark harvest jinx
21 stacks by 17 mins, 1800 damage, 0 comeback chance for the other team because it would only get stronger, ff at 18.
Games right now are literally about which champ can stack their dark harvest faster to just completely delete the enemy team from the game, it doesnt help that the more stacks you have the easier it is to get more stacks and kills and snowball even harder.
What breaks the rune is that it not only infinitely scales BUT IT RESETS, so compared to electrocute this rune is godly in squishirmes or team fights.
So if you're playing against someone whos bad at the game you basically get a free win, its too much snowball and damage to game, we really do not need this.