[Champion Concept] Excrucio - the Pain Master

Statistics

HP: 450 (+90) HP5: 7 (+.55) Damage: 52 (+3.5) Range: 125 Armor: 16 (+3) Magic Resistance: 30 Attack Speed: 0.625 (+3%) Movement Speed: 330

Abilities:

Innate Passive –

Gains .25/0.5/ .75/1/1.25/1.5 ability power per 1% of missing health (AKA Karma's old passive)

Q - Wound Transfer

On ally cast: Costs 8% Maximum Health. Excrucio restores 20/40/60/80/100 (+.3 AP) + 4% maximum health and gain a wound charge. (cannot be self cast) On enemy cast: Excrucio Deals 30/60/90/120/150 (+0.45 AP) + 6% maximum health damage. Damage increases by 20% per Wound charge. Additionally Excrucio heals for 50% of damage done. Range: 450 Cooldown: 10/9/8/7/6

W - Salt in the wound:

Deals 60/100/140/180/220 + 8% (+2% per 100 AP) of target’s missing health Cost: 8% current Health Range: 475 Cooldown: 6

E - Crippling Agony:

Deals 40/50/60/70/80 (+.5 AP) and slows all nearby enemies 20/24/28/32/36% for 3 seconds. Slow increases by 1% per 2% of target’s missing health Cost: 10% current Health Range: 500 Cooldown: 8

R - Shared Pain

On Ally Cast: Costs 10/15/20% current Health. Intercepts 10/15/20% of target's incoming damage for 5 seconds On Enemy Cast: Redirects 10/15/20% (+1% per 100 AP) of incoming damage to target for 5 seconds Range: 800 Cooldown: 150/135/120

Excrucio is a mage champion centered around HP mechanics. Unlike most champion with HP costs, it is focused more on damage that intensifies as its health becomes lower. While its healing might appear to be similar to Soraka's rework, its main purpose is to charge up the main source of damage. In teamfights Shared Pain can either help prolong you own life as you wade into the enemy or to prolong the life of a carry so that they can survive and output more sustain damage.

Lore:

Excrucio is a creature whose origin is of much debate. Some claim that it is the result of a Zaunite experiment, while other speculate that its origins are much older. Regardless of its origins, the only known information about it comes from a destroyed research facility in Zaun.
The creature at first appeared to heal minor injuries of test subjects. As time progressed the wounds it healed were more severe and were removed just as effortlessly. While the scientists thought they had found a medical breakthrough, the black mass turned out to be biding its time. It attached itself to one of the scientists and began its retaliation. Every previous wound it had absorbed was reflected on each of the victims. The last note on the journal was that the creature was looking for its creator.