This move would be a great asset to Hydreigon. Many people you fight will spam U-Turn on Hydreigon - lowering it's health, and since this pokemon is a powerful special attacker, it should do some serious damage PLUS heal it's health!
Actually that's what inspired me to think of it :3
A move to remove one's own ability...yikes Slacking and Regigigas will become OU if not Uber (ironically they share the same type and the same total base stat). I want this to happen!