Rengar Bug
There is sometimes a rare chance when playing rengar that your whole UI will break.
Screenshot: https://cdn.discordapp.com/attachments/356657381033377803/438981306664353792/unknown.png
It makes it so it looks like you need mana for your abilities, it makes your icon look like your dead, it doesnt let you level up any abilities, and it makes your player stats look messed up. And the only way to fix it is to relog.