A New kind of champion..

Well.. I was thinking about a champion which would have an N amount of ammo... lets say 100. When he attacks using his gun/bow/crossbow he consumes 1 ammo and when he gets to 0 ammo he turns into melee until he goes back to base where he recharge his ammo. He would have different abilities in range/melee form even his ult.. maybe.. I didn't thought about what abilities could he have but i thought it would be fun and interesting because people would have to watch out how much ammo they have before entering fights... I would like to see other opinions about this so feel free to "judge" my idea ..