[Passive Ability Concept] Weapons-Master

This is only going to be about a single possible passive for either a future champion, or one that already exists.

The idea is that just like Gangplank's Silver Serpent Coins, you earn a similar extra currency either over time or on doing an action, and can spend it on your passive. I'll call it "Mastery" for the time being. You will start with 200 Mastery at the beginning of a match, and can choose to buy a weapon or save it for later. The default 'weapon' without buying one is to fight melee range with weaker looking punches.

The character would be dynamic based on what item you most recently purchased with this currency, changing the way their abilities and basic attacking works.

Sword 200 Mastery: Gives the character a sword, which allows them a middle speed melee form of combat. This forces melee basic attacking and ignores [X] enemy armor. Club 200 Mastery: Gives the character a bludgeon, which allows them a slower speed melee form of combat. This forces melee basic attacking and hits enemies directly behind the main target for 100% damage (-5% per additional enemy). Bow 200 Mastery: Gives the character a bow and arrows, which allows for a faster ranged form of combat. This allows for ranged basic attacking, and has a chance to hit twice with a single basic attack for 65% damage on both hits for a total of 130%. Gun 200 Mastery: Gives the character a firearm, which allows for a middle speed form of ranged combat. This allows for ranged basic attacking and gives the player [X] shots before they must reload like Graves. Firing on different targets increases damage dealt by the next shot until you reload or hit the same target twice. Staff 200 Mastery: Gives the character a magical staff, which allows for a slow ranged form of combat. Shorter ranged basic attacks than bow or gun. Changes abilities to be AP based instead of AD based.

Each weapon can be upgraded two more times, but doing so costs 400, then 600 mastery for a total of 1200 mastery. If you upgrade a weapon, you can still swap to other weapons for 200 Mastery, and then go back to your original upgraded weapon at a later point for the same cost. Generally you will get between 2400 to 3000 Mastery per game, and can spend it at your leisure.

This would allow the character to play uniquely, changing it's play style and move-set midgame multiple times. It would also allow you to upgrade the ones you enjoy.

The character would be a damage based character, and not considered a support or tank. Fighter, Mage, or Assassin is what would fit this passive.

Let me know what you think below. Add on abilities, more weapons, or other criticisms and suggestions please!