New Game Mode: First Blood

So I was playing some customs with a friend because he didn't have enough to play a full game. What we did was meet in mid and just duke it out until one of us got first blood. Then we reset and opened up another custom and did the same thing over and over again. It was really fun and I realized it could be a great game mode, 1 v 1 sessions that are really quick and intense. It could be one and done or first to five where each round you would be able to pick another champ.