Diana small tweak but cool lunar themed passive to be tacked to R
I know that there is some update for Diana going on or planned, so I thought I'd toss out some ideas of passives that capitalizes on the variances in the lunar cycle. This can be in addition to her standard passive or attached to abilities The best way in my opinion to include all three abilities is to make each one unlocked for each level on Diana's ult. This keeps her even in early game, makes up for post ult heavy mana loss, gives her a pushing mechanic even with lower mana (possibly if a tower is pushed so she can chase, whether it be in her lane or from jungle ganks), and gives her a small tweaking component to adapt and better engage team fights . .
Waxing: Diana gains 1% of her maximum mana when basic attacking an enemy unit. This can occur once every 10 seconds. stacks 3 times against moonlit targets
Waning: Moonlight's duration increases by 1% for every 2% of missing mana
Phasing Edge: When Diana has over 65% of her maximum mana, she gains 5% cooldown reduction. When she has under 35% of her maximum mana, she gains 5% movement speed and attack speed. If she is has 35% to 65% of her maximum mana, she gains an additional 2% ability power and spell vamp . .
As far as game play it gives her a unique element derived from the way the moon changes. The first two passives would complement each-other greatly and keep her from bottoming out of mana as long as the player is judicial about their engages and laning. Waxing focuses strictly on rewarding those who can poke out their opponents and get basics on moonlit minions in the process by allowing them to regenerate extra mana. This is important as she can really chew through mana post level six. Waning helps both mana regen and potential comboing greatly as well as give a manaless Diana just enough of a time extension on moonlight to pop off a refreshing ult. With her Phased edge on her moon blade coming into effect late game, She would be unique in that she is the only champion that has a buff that encourages resource bar management without punishment (as apposed to gnar and rumble who both can be limited greatly if a player cannot handle it). It also would be the only resource bar like this that still runs off the regular mana system instead of its own champion unique energy. Its important that these are later game buffs that will be more useful in teamfights rather than trying to make Diana too dominant in lane (or snowball uncontrollably in the jungle)
Just wanted to throw some of these out there