Random Champ Idea - Revenant, the Mage Slayer

(Random thought this morning. Wouldn't let me sleep until I finished hashing out the idea, so I figured I may as well share it. Upvote if you like the concept!)

A mage-slayer in life, Revenant was slain and later resurrected as a shade (by an unknown party) so he would suffer for all eternity. He seeks to exterminate magic from the world.

P - Spellshield, similar to Pantheon block/Morgan's W. Armor/AD scale together. Q - Melee stun (short), deals damage and heals Revenant. Scales with MR/AD. W - Shadowstep: allows Revenant to be untargetable, invisible, and step through walls for 1.5 sec. Deals bonus damage and stuns (short) if ended under an enemy champion. Bonus damage scales with MR/AD. E - Temporary Damage Reduction, scales with MR/Armor. R - Anti-Magic Field, Large area effect silence, drains mana per second from enemies. Scales with MR/AP.