Due to the lack of villains I thought it would be a good idea bring the mighty Skaven yes-yes. 

Name: Zek Skitterback warlock-engineer of clan Skryre

Universe: warhammer fantasy

Appearance:
[img]https://i.imgur.com/oP4VXjA.png[/img]

Skill set/Abilities:

Skitterback has access to clan Skryre technology. Fueled by a substance known as [url=https://vignette.wikia.nocookie.net/warhammerfb/images/6/6c/Token-Warpstone.png/revision/latest?cb=20140426234546]warpstone[/url]. The rock appearance of a brightly emerald green crystal, a product of the solidification of pure Chaos energy. Highly dangerous only the skaven have built up a sort of immunity to the rock. Clan skryre had harness to warpstone to power there weapons and devices. These creation are naturally unstable.

Being a warlock-engieer he can call upon the lore of ruin to cast by magic with warpstone gauntlet being used to augment spells. But just like skeven technology its unstable and dangerous to cast as well. Skitterback known several spells:
[hider=Spell list]
Warp Lightning: He points a fleshy paw and bolts of greenish-black lightning arc outward towards the target.
Scorch - Thrusts his paws into the ground while chittering fiery incantations, causing a gout of flame to burst forth towards the target
Warp Storm: Summoning a storm anywhere within 48 yards, which angrily discharges greenish black bolts of warp lightning. This storm is formed of pure warp energy, fueled by the malignant power of the Horned Rat.
Howling Warpgale - The caster gestures twitchingly to the skies and fierce hurricane gales begin to build until it swirls around the entire battlefield.
Skitterleap: With a "Bamf!" the Skitterback disappears in a puff of smoke to appear elsewhere on the battlefield.
Flensing Ruin - Green ribbons of Warp energy tear the flesh from the target’s bones
[/hider]

Background: 
From the birthing pits of skavenblight Skitterback was born into the world. Vicious even at a young age he murder several of his own sibling to better nurse from his mother. After reaching maturity he joined the ranks of the clan rats of clan Skryre fighting in the underdark against the clans enemies. He was recruited as on of the many "lab assistance" to one of the warlock-engineer. Surviving the deadly testing Skitterback was able to plan the death of one of the warlock-engineer apprentice maneuvering himself into position do be chosen as the replacement apprentice. Now with a power-base at his disposal he began his rise to power. Assassinating rivals he soon maneuver himself into the next to the main warlock-engineer. Said skaven died due a tragic accident of being poisoned, shot, stab, and set on fire for good measure. After such a tragic end Skitterback eagerly took up the mantel of the warlock-engineer. Once his power was solidified he began to make-sure that his rivals met grisly ends.

Other information: 
Skitterback carries many of his clan weapons. Like a warpstone-infused halbert and a warpstone pistol a simple flintlock pistol that fires a warpstone black-powered mixture. He carries several Poisoned-Wind Globe glass spheres that contains a deadly warpstone gas. He protects himself with a mix or arcane and normal armor to protect himself. He wears a respirator to keep out toxic fumes.