Champion passive idea

So i thought of a champion passive that might be pretty cool, especially with the new conqueror

Passive: Bloodless Enemies cannot heal from the damage they deal this champion.

Note that its healing from damage they deal which are lifetsteal, omnivamp, ravenous hunter and conqueror. Basically its any % healing from damaging. Heals like Q W, fleet foot etc which have fixed healing amount still work.