What about a true flying champion?

I don't just mean the way Quinn's bird flies or Anivia are flying, but a true flying mechanic that allows a champion to go over walls (maybe not the highest ones) and scout from the air.
In my opinion there would absolutely have to be a max movement speed built into the champion or maybe they are just prevented from purchasing boots.
I would love to see some of the following abilities and passive:

Passive: While flying, able to have vision of bushes from a certain distance away. This would make sense since the champion would truly be flying and could see from above.

Ultimate: Comes crashing down from the sky and plants beak into ground and being rooted into the ground as impassable terrain for a set period of time. EITHER: Doing a ton of AOE damage and being weak after. Or doing a modest amount of damage and gaining increased defensive stats as the wall.

Passive: After landing on the ground, bird champion has to get a running start in order to be able to fly again. During this time the champion is incredibly weak.

Thinking of a champ that would be a scouting and utility jungler.