Assassin kayn Change

Darkin and Assassin Kayn have Drastically different play rates. Assassin needs changed so it is a viable option alongside Darkin

I have an idea that could make assassin kayn easier to balance and make it played more due to it being more useful in more situations.

Make Assassin Kayn's Damage completely Magic damage and give him Bonus damage when entering combat as well. kind of like Corki where his autos are magic damage. Make it so his passive converts a percent of the lethality he has into magic penetration instead (70% of Armor penetration is converted to Magic Penetration)

This would give kayn players more reasons to pick assassin kayn (Maybe their team is AD heavy and they need magic damage) maybe someone on their team is really fed early and the entire enemy team is building armor. I believe this would be a great change to assassin kayn and would make it so there are also more Magic damage junglers that are playable as well.