Game Mode Recommendation

I've been thinking about league adding a deathmatch or free for all game mode. Also for halloween I was thinking if there was a special game mode of zombie minions trying to kill the base and everytime they kill a champion, the champion will (obviously) receive a cooldown penalty and the zombie minions will receive a zombie version of the champion they killed.

These are just game modes I've been thinking about for a long time and decided to express the idea. I know this is poorly written and may not be seen as much, but I'm hoping I get feedback and to those who read this thank you for reading.