Valentina, the Mystic Shield
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Hi everyone! I have another idea for a champion concept!
Name: Valentina Faith Heart
Homeland: Independent, Unknown, presumed to be Noxus
Friends: N/A
Allies: 
, 
Rivals: N/A
Class: Mage
Lane: MID
Powers
Passive: Spirit Leeching
Valentina's telekinetic shield slows enemy units in a ring around it worth 10% every 1 second (range for this is about the size of Lux's E).
Q: Soul Piercing
Range: 1175
Mana: 55/75/95/115/135
Active: Valentina forces her shield to roll forwards (like a wheel), dealing 60/100/140/180/220 (+80% AP) magical damage to all it hits.
Cool down: 10/9/8/7/6 seconds
Attack style: Skillshot / Linear
W: Barrier
Range: 520 (active)
Mana: 90 (all levels)
Passive: Valentina's shield drinks in damage at a 10/11.5/13/14.5/16% reduction.
Active: All the damage Valentina's shield drank within the last 4 seconds will be channeled back at 40/45/50% effectiveness along with 50/80/110/140/170 (+65% AP) magical damage and her shield will blast the damage forwards in a cone.
Note: While active is on cool down, so is the passive.
Cool down: 14/12.5/11/9.5/8 seconds
Attack style: AoE / Cone
E: Ravage
Range: 1175
Mana: 70/85/100/115/130
Valentina forces her shield to return to her, dealing 70/110/150/190/230 (+75% AP) magical damage to the first target it hits. After this, every other target hit reduces the damage by 5% maxing at a 40% reduction.
Cool down: 12/10.5/9/7.5/6 seconds
Attack style: Skillshot / Linear
R: Holy Vengeance
Range: 3340
Mana: 100
Valentina charges up for 1.5 seconds, after this, she blasts her shield forwards a great distance. This deals 300/450/600 (+75% AP) magical damage to all it hits. After using her ultimate, her shield hits a power spike. This power spike allows her next ability to deal 30/35/40% increased damage to all hit by her ultimate (if cast within 2 seconds).
Note: You are able to choose how far this goes.
Playing as / against Valentina:
Playing as Valentina: Your passive allows for easy follow ups. You have plenty of lane harass, however, if you harass too much it will turn against you. If your E is down, back off of the enemy team. They can easily engage you while it's down. Your shield is highly mobile. You can use her Q to propel your shield forwards for your W, then return back with an E, or end with an ult.
Playing against Valentina: If she is harassing with her W, she is left without her damage reduction bonus. Attack during its cool down. If her E is on cool down, she has nothing to bring back her shield. Valentina's ult is dodge able, and you can easily tell when she is charging it. Heavy cc can stop her during the charging process. If you are hit by her ult, beware the power spike.
Artwork: (Not my own work. Couldn't find the author's name, yet all rights still belong to him/her. I have looked for the actual artist. However, it is posted under and unnamed account on imgur.com)
Lore:
There are stories of a woman, lean, agile, and alluring with an otherworldly beauty that every man and woman tell their child. The tell is fascinating, with several different perspectives thrown together. Some would say she a monster in human skin, sent from the depths of the shadow isles. While others believe she is the daughter of some otherworldly force, or a well trained assassin of army of Noxus. Yet, none know for sure, but there is one subject none dispute, and that is the power of the proclaimed Mystic Shield.
No one, from the toughest King to the scrawniest farmer would dare set foot in her path for all fear the blade-like shield the woman wields. While no one has reported the young girl murdering innocents, there are are reports of various slain beasts appearing across the world, their flesh burnt away from their bones. Similar occurrences have occurred all around the world, yet these weren't beasts slain. Someone was hunting down the most dangerous and infamous villains known to Runeterra. It wasn't until a certain prodigal explorer patched the pieces together that everything made sense.
The woman wasn't just hunting beasts and slaying evil-doers. She was cleansing the world of those who meant to harm it. The beast slain had harmed local villages, and the people slain had killed, murdered people in cold blood. But, none are sure how far the Mystic Shield is willing to go. Will she kill those who cause wars? Will stop those who intend to change the world through blood? Where does the Mystic Shield draw the line? That is a question none wish to answer, but a question all wish to know.
Special Interactions:
Pentakill: "My work here is done." or "(chuckles) Now, what next?"
God-Like: "Barely breaking a sweat."
Other kill titles: "Nice try, but no." or "My shield thanks you for this battle."
Minions (second one if taking minion aggro): "They just keep coming, don't they?" or "Ouch, magical cloth hurts." or "Hmm, do these things even have souls?"
Baron Secured (assist or kill): "Thought that be harder, ah well." or "Never killed one of those before. Fun."
Dragon Slain: "Chalk up another beast for me." or "This would make a fine addition to my wardrobe."
Traveling Through River: "Ugh, now my socks are wet." or "Eww, gross, wet socks."
Tower (enemy) down: "Well, one less annoyance."
Tower (ally) down: "Well, isn't that great?"
Buys any item: "Expensive, but worth it." or "I find this tedious and expensive." or "Very well, I broke the bank again." or "Why do you need so much gold?"
Dies: "Oh, ouch-ie." or "I'll be back."
Kills dark themed enemy: "One less villain on these lands." or "Light always wins." or "My shield's thirst has been quenched." or "Darkness is just soulless form of light."
Kills dark skinned enemy: "I don't know why you'd want to align with darkness, but so be it." or "You should have stayed away from darkness." or "Was the change in appearance worth it?"
Kills any champion: "Ah, finished." or "I should really keep count of these." or "That's what I call a confirmed kill."
Start of game: "I can feel the darkness radiating on this land." or "The souls of the dead linger here." or "My shield will cleanse this land."
Summoner Recognition: "Calm yourself summoner." or "My pockets are getting heavy, master."
Moving: "Bossy, but no matter, I have dealt with worst." or "I wonder what this path holds."
Wards: "Hmm, vision is any magician's greatest concern." or "I suppose I will drop this here." or "Does this count as littering?" or "Good, now, I may fight."
Destroys a ward: "Spying on me where you?" or "Like what you saw?" or "Sneaky little bastard." or "Normally, I would be against allowing darkness to spread, but I allow it this once."
Control ward (ally) stops a ward: "(laughs)" or "Got cha." or "What, thought you were gonna ward? Think again."
Emotes:
Ctrl 1 - "Magic and shields? Perfection." or "Want to see a magic trick?"
Ctrl 2 - "Come and get it." or "(laughs) you are my enemy? Really? Alright."
Ctrl 3 - She flips her shield on its side and begins to spin it like a record, playing music.
Ctrl 4 - Powerful yet fun.
Recall - She steps onto her shield, kneels, and vanishes in a flash of white fire.
Death - Her shield consumes Valentina before exploding and vanishing from sight.
Basic attack - She fires a silvery bolt (similar to Karma, Morgana, etc.)