I created a New Champion....Is it good?

Name: Borris

Passive: Replenish- Borris regenerates 20% of his missing health every second until he has full health. [No Cooldown]

[Q- Axe Toss]: Borris throws his Axe, stunning hit targets for 1 second and dealing 50% of his health as Magic Damage. 30% of his health is refunded when he kills a unit. [2 second cooldown][30 Health Cost]

[W- Rapid Spin]: Borris Spins Rapidly, dealing 30 Magic Damage per hit and slowing the target until Borris chooses to stop spinning. [Toggled Ability][3 Health per second]

[E- Wall of Armor]: For 15 seconds, Borris is protected by a Wall that gives him [50/100/200/400/800] armor. [20 second cooldown][70 Health Cost]

[R- Empowerment]: Borris’ Regeneration is passively increased by 50%. He can Empower his next ability and it’s effects are doubled. [50 second cooldown][100 Health Cost]