New Game Mode: Wolf
It would be VERY similar to blind pick, however one person on each team would be randomly selected to be Wolf. They can chose to tell their team about it, or keep the secret. The Wolf is in sheep's clothing, he can turn and hunt his team, or help them win. Another thing, each person only has THREE lives, once you lose them then you're out of the game. You'll get a notification to view the results after it is finished or you can spectate. Use those lives wisely... At any point in the game, each team can vote to activate the traitor (it would take three yes votes to do it instead of four). EVERYONE is notified that a team's Wolf was activated. At that point, the Wolf has a voting box with one vote. By voting yes he turns traitor and gains the ability to damage/be damaged by his old team. If he/she does and the team he defects to wins, the Wolf gets twice as much IP, and if they lose, he gets half as much. Stayling with his/her team will keep the IP gain at the normal value. You can only attack the Wolf AFTER he/she is activated AND they accept this activation. Each team will hear the call to action, but they won't know when the traitor has voted yes themselves.
Both teams have a Wolf on their party, so it could end up that you exchange teammates or it's a 6v4. The point is that the Wolf could strategically time his betrayal.
Here's the original thread: http://boards.na.leagueoflegends.com/en/c/gameplay-balance/E9f3UmOv-temporary-game-mode-idea-traitor-mode
Watch your back and happy hunting...