This is my 4th or 5th champion suggestion...
Kazuko, The Arcana Supreme
Cost: 3150 IP / 790 RP
Birthplace and Residence: Zaun
Passive - Soul Absorption
Whenever one of Kazuko's abilities kill an enemy champion, she regains 50% of the mana she used.
Q - Ice Bolt
Range: 550 Cooldown: 15/13.5/12/10.5/9 Cost: 65/70/75/80/85 Mana
Kazuko shoots 3 Ice Bolts out of her hands, in a skillshot cone, dealing (70/80/90/100/110) Magic Damage (+0.75 AP), enemies which are hit are slowed for 1.5 seconds.
W - Spiritual Charge
Range: 600 Cooldown: 16/14/12/10/8 Cost: 50/65/80/95/110 Mana
Kazuko channels for 0.5 seconds before charging in a straight line, dealing (40/60/80/100/120) Physical Damage (+0.5 AD), any enemies which are hit are knocked into the air and are stunned for 0.5 seconds.
E - Soul Exchange
Range: Line of Sight Cooldown: 25/22/19/16/13 Cost: 70/85/100/115/130 Mana
Kazuko calls on the spirits of her dead ancestors, channeling for 1.5 seconds, to trade positions with the nearest enemy champion.
R - Soul Rend
Range: Global Cooldown: 120/105/90 Cost: 130/160/190 Mana
Kazuko channels for 5 seconds before unleashing a Wave of Spititual Energy, which deals (250/300/350) Magic Damage (+1.0 AP), any enemies affected are stunned for 2.5 seconds.