Cleanse Ghost
I am a platinum player. I am theoretically capable of reaching diamond, if I put enough time and effort.
At any point of my life I can level a smurf. After I play my placement matches it is going to end up in silver, even if I try my hardest. Silver 5 if I don't get lucky.
In that silver, up to the lower gold, I can reliably, with positive winrate(especially if I don't get griefers), carry with adc Blitzcrank or cleanse-ghost adc Soraka. As an artificial handicap upon myself. And when I say adc, I mean it - IE,zeal items, lifesteal.
Smurfs will fucking annihilate me, but if I don't lane against one, I am gonna be fine. Theoretically, I could get this challenge up to platinum, as I did with my Teemo account.
So we end up with a tricky situation - a player, who handicaps himself - for fun, for personal challenge/improvement, for the rule of cool or stream value. He doesn't grief, but obviously doesn't use everything he can to win.
And here is a poll and a discussion.