Olga - The Valkyrie Goddess

So, this is a concept I've been working on for some time. I don't really know a lot about balance so the numbers provided may be out of line. I also can't really draw so I have no art to go with this.

Olga – The Valkyrie Goddess
Gender:Female
Age: physically 22, she has ascended to the frozen watchers and her body was frozen so her age is above 1000 years as shes considered a goddess. 
Friends with: Aurelion Sol, Ornn, Pantheon, Taric, Ashe, Sejuani.
Enemies with: Lissandra, Darius.
Appearance: Olga is a blonde, blue eyed Valkyrie warrior. She has silver Pauldrons over the bear fur which covers her down to the abdomen.  Her upper armor also consist of a breastplate and vambraces on each arm all in silver with gold ornaments. She wields a wooden spear with a silver point head, enchanted by Ornn to have the power of thunder, which is why it has an electric aura surrounding it. On her other hand she wields a red/white wooden shield given to her by Taric. It has a silver buckle in the middle. Her lower armor consist of a leather belt that holds another two pieces of bear fur that reached down to halfway through her thighs where she has shin protectors made from silver and leather boots with silver wings on each side. 
Character: Olga is a brave warrior that will face any danger without second thought. Although somewhat arrogant because of the power she has gained, she helps her warriors in the battlefield without selfish thoughts. 
 
Type: Bruiser/Diver
Damage: Primarily AD, some AP
Health: 580 (+80 per level)
Mana: 435 (+30 per level)
Attack Damage: 65 (+3.5 per level)
Attack Speed:     0.615 (+2.5% per level)
Movement Speed: 340 
Health Regeneration: 8 (0.6 per level)
Armor: 35 (+3 per level) 
Magic resist: 32 (+1.2 per level)
Mana Regen: 7 (+0.5 per level)
Range: (270)

Abilities: Passive: Watcher’s Calling Description: Every Damaging ability on an enemy champion marks them for 3 seconds. Auto Attacks onto the marked target causes Olga to leap on the target, thrusting her spear, dealing 50 (+70% bonus AD), (400 range). The same target cannot be marked for the next 3 seconds.

Q: Spear Thrust Description: Olga thrusts her spear forward (500 range), dealing damage in a line 60 (+5 per level up) (+55% bonus attack damage) Cost:45/50/55/60/65 Cool-down: 7/7/6/5/4 range: 470 W: Frost Shield Description: Olga gains a shield equal to 15% of total damage she dealt to a target in the past 2.5 seconds. She gains 30% decaying moment speed but cannot attack for 2 seconds (including casting spells). Cost: 50/50/55/60/60 Cool-down: 15/14/13/12/10

E: Shield Charge Description: Olga charges to a direction shield first (600 range), damaging all enemies she passes through for 30 (+5 per level up) (+20% bonus magic damage), stopping at the first champion hit to deal an additional 50 (+50% bonus magic damage) and stunning them for 1.5 seconds. Cost: 70/70/80/90/95 Cool-down: 15/14/13/12/10
Range:500

R: Thunder-Born Wrath
Description: First Cast: Olga releases a shockwave (650 range radius) dealing 120 (+100% bonus attack damage). Enemy champions within the radius are stunned for 2 seconds and marked with Watcher's Calling.

Second Cast: Olga dashes towards the champion closest to the cursor, thrusting them with her spear for 50 (+60% bonus attack damage) and 30 (+40% Bonus ability power). If the Enemy Target is below 25% health, the damage is doubled.
Cost: 100
Cool-down: 120/100/80 range: 700

Lore: 
Before the establishment of the Freljordian tribes, the first travelers arrived at the winter land. Olga was amongst them, a brave young warrior. From birth, the markings on her face told of ancient myths of Gods and prophecies of war. Her parents were assured she was born for battle. 
Her father, the leader of the first tribe, a great barbaric warrior taught her how to use the spear which she mastered at the age of five.
One year later she was faced with an old Freljordian trial. She was put under the test of survival and bravery by being left in the wild for a week to survive by herself. The first day was a harsh one, with ravaging snowstorms and falling ice. She scavenged seeds for food and has hiding in a cave away from the terrors of wild animals and the fierce wind. In this moment of desperation, she remembers of stories foretold by her grandad, a sword wielding raider. It was a story of a mythical beast that seized mountains at its will and forget weapons worthy of gods. She remembered that the stars will lead her to Targon, the place where this beast could be found. She walked for days upon days through the fierce cold winds and through the thick forests with stars as her guide.
Upon reaching the ground of Targon her marking glowed with a bright blue light that shone brighter as she climbed towards the mountaintop. Upon reaching the top of the mountain her markings glowed towards the sky, forming a light beam reaching the grounds of the aspect realm. Seconds later a thunder struck the surface as a response, and the God of Forge rose from the smoke. It was Ornn, the mythical beast whose stories have been passed down to Olgas tribe. The aspect of war, Pantheon also fell from the sky, exploding on the ground and standing heroically in front of her. A third glow revealed the aspect of protection, Taric, who was holding a wooden shield. 
Taric moved close to Olga, handing her the shield, blessing it with the power of protection, reassuring her this wooden shield “would stand against the greatest of fires and bash through mountains”. 
Pantheon handed a Valkyrian spear to Ornn who enchanted it with the power of the god of thunder. It was then handed over to Olga by Pantheon, who told her “this is an offering worthy of a Valkyrie”. Olga was a godly presence from birth, her markings calling to the Aspects from Lokfar for recognition. And there she stood, having accepted her fait as a goddess she left Runetera to join the Aspects. In their realm she met with Aurelion Sol, who granted her godly powers. She was not an aspect herself, nonetheless she had unimaginable power.
Days have passed after Olgas trail has ended and the whole Freljord was in arms with rumours of a kidnapping spreading quickly. Trying to find someone to blame, the Freljordians blamed the disappearance on Noxus, which started their ongoing conflict. Olgas heart and spirit rested at Freljord. She overlooked and blessed her fellow warriors at battle, ensuring their victories. But years passed, and she reminisced her life in Freljord, so, she decided to reappear, promising to watchers she will not use her godly powers during her visit. Her goal was to end the civil war between the three tribes. Sejuani saw a strong warrior in her, even without her godly abilities, whilst Ashe approved of her quest. Lissandra however wanted to attain her powers, and upon Olgas journey to Guardian Helada, she was captured by Lissandra and took hostage. Days of torture have passed until Olga reached her limits. She called upon her godly powers as she released a shockwave that annihilated Lissandra’s kingdom, leaving her as the only Iceborn survivor. She was freed from her chains, but she has broken her promise to the Watchers, and was taken back to them.
They greeted her with hostility and made her kneel before them. One of the watchers drew a frozen sword, ready for execution. The Valkyrie was not ready to accept death, she drew her spear and prepared for a duel. The watcher wielding the sword laughed in arrogance as he accepted Olga’s challenge. The duel lasted for 4 days and they were fighting each other to the death. With a swiftly strike, Olga thrusted her spear into the watcher’s throat, ending their battle. She then slayed the rest for all their evil doings which corrupted Freljord.  She now oversees Freljord, blessing the warriors with the spirit of bravery and battle, whilst she protects them from attacks from foreign tribes. 

Quotes:

Upon casting Q: Battle cry

Upon casting W: "The frost protects me!"

Upon casting E: Battle Cry "You can't run"

Upon Casting R: "You will meet your maker!" "The Gods are with us!" Battle cry

Upon spawning: "Let us raid!" "Let the massacre begin!"

Moving: "Bring them to me!" "Let us slay!" "May our battles be blessed"

Upon Receiving Damage "You dare defy a goddess!" chuckles "I will teach you a lesson!"

Upon dealing damage: "Take this!" Battle cry "Strike swiftly, strike deadly"

Upon killing an enemy "Too weak, yet too confident!" "You are worthless! Kneel before your maker!" "Freljord will rise!"

Upon being picked: "Absolute Power" "May our battles be blessed" "Let us raid!"

Upon being banned: "Was my power too much for you to handle?"

Hopefully this will get some recognition. Also, sorry if the lore is not chronologically correct. :)