I was in a normal game as Ezreal and had noticed that his Q mystic shot was rewarding 8 Mana instead of the 4 stated in the description said it did.
(+350 Mana +7 Mana Regen per 5 sec UNIQUE Passive: Each time your Champion uses an Ability their Maximum Mana will increase by 4 Mana, up to a maximum of twice in a six second period; bonuses cap at +1000 Mana.)
I tested it again in a practice game and come to find out that not only does his Q mystic shot reward 2 stacks on the item but it also combined with his e or w grants 12 Mana instead of the 8 cap per 6 seconds.
Also it does not always give the 2 stacks mostly when it is used as the opening in the rotation but if you use his W and then his Q the two stacks are not rewarded.
That is all figured you guys at riot would at the very least find this interesting its not game changing or anything.
-- The Mayor