Zed rework idea to fix his glaring issues

Passive: It takes all skill away from last hitting with him while being weak vs champions because it can only happen once per fight. Remove: No longer works on minions. New: No longer has a cooldown per target. New: Abilities can now apply this.

Q: Zed should be rewarded for landing multiple shurikens, not punished. New: Shurikens now deal full damage to all enemies hit. New: Multiple shurikens from shadows now deal full damage.

W: Thematically this is the ability that defines Zed, but gameplay wise it's lackluster. New: Shadows now spawn instantly instead of travelling to the target location. New: Shadows now use a charge system with same cooldown to recharge and with 3 maximum charges. New: Casting on ground spawns a new shadow, casting on another shadow swaps position with it. New: Shadows now attack nearby enemies prioritizing champions and dealing 20/30/40/50/60% damage. Shadow attacks can critically strike and apply on-hit effects.

E: Multiple slashes from overlapping shadows now deal damage (100% damage).

R: There is no reason Zed should hard counter AD stackers on the enemy team. Also the shadow spawned at his location gives him too much room for error. Removed: No longer gives Zed free AD for killing the target. Removed: No longer spawns a shadow on cast location. New: Now causes all Zed shadows to dash to and attack his target. New: Cooldown changed to 60/40/20 seconds. New: Killing the target gives a charge of living shadow.

Aghanim's scepter: Turns Zed into a untargetable shadow for the duration of death mark.

Those changes will make Zed more fun, balanced and healthy for the game.