Nidalee gamebreaking bug
Everytime nidalee uses pounce, the champion teleports to a random place on the map for a fraction of a second and then reappears at the spot where she is supposed to land.
It looks a lot like lag but it's not, because every game there has been a nidalee everyone has been able to see this bug.
Two instances that really broke the gameplay for me were:
-Nidalee was splitting bot and suddently she appeared midlane next to me and caused flashes and ultimates and then she disappeard about .5 seconds after to show up bot lane again.
-The second was when she was top and in a bush and suddently she was just on top of me with no counter play possible.