just an item idea
The Arcane-Hextech Staff- you chose either hp, ad, ap, mr, arm, or resource (mana, energy) when you first get the item. every minion kill granks 1 stack, assists/kills/large minion or monster grant 3 up to 100 stacks. at 100 stacks you get 20% buff ratio in that field you chose as a persistent effect. could buy multiple staffs, but only stack 1 at a time. the buff applies even after item is sold. bit of a snowbally item if used right, but would add a fun mechanic that wouldn't have a HUGE impact on scaling.
+
/
/
/
/
/
/