New champion concept: Arrel, the electrical warrior

Hello guys I have an idea for a champion. I have to say that I inspired myself a litle from the Fullmetal Alchemist anime. Tell me your opinion in the comments.

Arrel, the electrical warrior

Arrel is a mobile fighter that seeks revenge on the rifts, manipulating energy to survive and deal TONS OF DAMAGE.

Appearance: Quite tall Teenager with a black and teal cloth and a cape. His left arm is bandaged from the shoulder to the tip of the fingers. Dark short hair. (maybe holds a knife in one of his hands?)

Stats Health: 470 Health regen: 7 per 5 sec Mana: 380 Mana regen: 4.5 per 5 sec Melee: 150 range Attack damage: 60 Attack speed: 0.65 Armor: 24-87 Magic resist: 20-76 Movement speed: 335

Spells:

Passive: Mark of discharge Everytime Arrel casts a spell on an enemy, it marks it with the Arcane Mark for 5 seconds, stacking to 4 times. If Arrel attacks the marked enemy he steals 4% of his ad, armor, mr for 2 seconds.

Q: Electrified ground- skillshot (670 range) Arrel puts his hands on the ground and summons the power of electricity that runs through the ground and deals 70/110/160/200/250 (+50% of his Attack Damage) physical damage.

W: Passive: Always ready: Arrel gains 3 movement speed for every minion or mosnter near him and 6 movement speed for every enemy champion near him (600 range)

Power Shield- AOE spell (175 range) Energy bursts around Arrel, dealing 50/75/115/150/180 (+3% of his max hp) physical damage and shields him for 75% of the damage dealt.

E: Martial leap (500 range): Arrel leaps on a target (not an ally) and pushes him for a distance of 250 range, dealing 30/55/80/120/175 (+35% of his Attack Damage) and pushes himself on the target for a distance of 200 range.

Ultimate: Electric Wall: (0.7 sec cast time, 1000 range) Arrel draws energy into himself and puts his hands on the ground, summoning energy that breaks the ground and deals 200/350/480 (+25% of his Attack Damage) and creates a wall at the end. If enemies stand on the are in which the wall grows, they get knocked up for 1 second.

Lore:

Arrel never knew his parens. His father died in a war before he was born and his mother died giving him birth. At the age of four, after living on the streets of Piltover, a man, named Mister R took him as his novice. Arrel easily learned the martial arts, almost beating his tutor. When he reached the teenage years he left his home for a journey. As he was walking through the mountains, he noticed a sparking stone. As courious as happy, he fastly rushed at it. Arrel descovered a glowing white orb. He was afraid, but he touched it. The orb entered his mind , learning him the ways of manipulating matter around himself. The day after, Arrel was so excited. He sent the orb to his tutor, along with a letter:

„Dear Mister R., I found this orb in a cave, two days before you read this. When i touched it, I felt a strange power running through me. Now i can make sparkles from my hands! I sent it to you so you can analyse it. I’ll come back as soon as I can. I think that the stories i heard about magicians are true!”

But after Arrel came back home, the house was burnt down. Mister R left the city and took his orb with him.

Arrel follow him and tried to take the orb back, but when he finally reached him, Arrel fell into a trap that cut one of his arms and a part of his stomach. He had to kill a horse and use it’s flesh to reconstruct his arm.

Arrel joined the league to reach Mister R and make him pay.

STOP! I know you're probably going to write that the champion would be OP so that's why I ask you to give me your opinion (with criticise too, but don't be hateful).