[Suggestion] New form of crowd control idea: Possess

Hi all, I thought of an idea for a new type of crowd control I (personally) haven't seen suggested!

Possess (ultimate ability): Possess the enemy target champion to fight for you for 1.5/2/2.5 seconds. During this time the enemy target champion becomes friendly and cannot be attacked by you or your allied champions. While possessed, the enemy target champion will autoattack nearby enemy targets (prioritizing enemy champions) and can take damage from his or her allies at 20% reduced damage.

In essence, this would basically allow you to make an enemy champion fight for you for a short period of time. The cool thing is that the enemy champion could indirectly be hurt by their own allies abilities as well. They would only take 20% damage from their ally's abilities in order to reduce the risk or griefing and the ability being too OP.

What do you guys think? :)