Mordekaiser's new ult can literally kick any fed enemy out of any fights
Imagine you got fed & gained tons of gold to buy good items, and once you're going for a teamfight, BOOM, enemy Morde kicks you out of the battlefield for a good 7 seconds, while your team's getting shredded by the opposing team.
I don't know if this is somewhat balanced or not. Can't judge too much yet til they release more details in PBE.