Unit-V: The Mad Golem
This is a rough idea at best so please understand that. Also please know that the numbers may be off and are subject to change.
Seeing the creation of Blitzcrank and Orianna the Noxian scientists began experimenting with robotic life as well. After many trials and errors the Noxian scientists finally created Unit-V. Created with modern Hex-Tech technology and advanced magic, Unit-V was created to kill Demacian mages. However Unit-V began killing anything with magical power. Unit-V only focus is to purge the world of magic users.
Passive: Siphon - Unit-V absorbs and decreases the ability power of any mage around him by 10%. (This way when fighting mages his ability power increases while the enemy mages decreases.)
Q - Unit-V shoots out a laser pulse from his hand. (Skill shot)
W - Passive (If attack with a ability that scales of AP Unit-5 absorbs 15% and turn it into energy either replenishing his magic or health which ever is lowest at the time.
E - Unit-V bashes the enemy with his hand knocking them back. If he hits them against a wall does extra damage and a stun.
R - Unit-V open both hands and fires a constant beam of energy out while he spins in a circle.
I'm not entirely sure on the % and it's something that can be hammered out later.
His weakness comes from fighting someone that has no magic. So champions that have energy will not have to worry about the passive or his W as much.
The skills can be changed up a bit and I'm open to suggestions. I Just wanted to create a tanky mage killer.
Please don't be harsh it is merely a basic idea.