Gorefiend by Xero

Ride or Die!:
Gorefiend can activate On a Pale Horse to move an additional 40% faster, decaying over 2 seconds. This effect has a 20 second cooldown.

Shadow of Death:
Gorefiend moves up to 30% faster depending on his missing health, moving faster when lower.

Spirit Siphon:
Gorefiend is healed for 25% of the damage haunted heroes take.

Void Slam:
Dark Slam deals damage equal to 5% of the target's health to enemies at over 50% health.

Unbound Undead:
Chained Bone can be reactivate to command to move the skeleton to the target location.
Also increase the damage done by Chained Bone by 25%.

Cryptic Strike:
Quest: Hit 30 heroes under 50% health with Dark Slam.
Reward: Dark Slam deals an additional 100% damage, depending on the target's missing health.

Chill of Death:
Haunt increasingly slows the hero's movement speed by 3% every second, up to 15%. Lasts half a second after Haunt ends.

Plagued Spirit:
Haunted heroes take 10 damage every 0.5 seconds. Deals double damage to enemies above 50% health.

Mana Drain:
When Haunt ends, it refunds 30 mana. If the haunted hero dies, it refund 60 mana.

Curse of Undeath:
Each haunted hero takedown also increases the armor reduction of Haunt by 1%, up to a 10% bonus.

Gorefiend's Grasp:
Mana: 100
Cooldown: 80 seconds

Gorefiend gains 20 armor for 6 seconds while shadowy tendrils reach out from him to each nearby hero, both friendly and enemy, pulling them to Gorefiend.

Dark Reanimation:
Mana: 100
Cooldown: 80 seconds

Reanimate a dead ally, stopping their deathtimer. After 3 seconds, they are brought back to life with full health, 10 armor but completely immune to all healing. After 15 seconds or if the hero is killed, their body once more becomes lifeless and their deathtimer resumes.

Death Knight Rider:
Ride or Die! (level 1 talent) grants an additional 10% movement speed and the bonus decays over 3 seconds.

Evil Touch:
Dark Slam damages all enemies hit a second time 2 seconds later.

Jailored Bone:
Chained Bone pulses 0.25 seconds more frequently and slows enemies hit by 10% for 1 second.

Heart Strike:
Dark Slam heals Gorefiend for 400 health if an enemy below 30% health is hit.

Corpse Explosion:
Chained Bone's last pulse causes the skeleton to explode instead, dealing 300 damage with a doubled range.

Drain Soul:
Cooldown: 30 seconds

Destroy a friendly minion and heal Gorefiend for 100% of it's health.

Soul Gluttony:
If an enemy dies five seconds after being pulled by Gorefiend's Grasp, it's cooldown is reduced to 5 seconds.

Vengence beyond the Grave:
If the reanimated hero participates in the hero's, who killed them, takedown, then they are instantly revived at the position of their body.

Control Death:
Gorefiend yields only 0.75% of a hero's experience upon takedown. Additionally, Gorefiend dies 5 seconds after taking fatal damage, allowing him to act freely but be unable to be saved.

Scepter of Necromancy:
Haunt and Chained Bone gain an additional charge and their cooldowns are reduced by 2 seconds.

Let Battle be Joined!:
Ride or Die! gains two more charges and the bonus delays over 6 seconds. Requires Death Knight Rider (Level 13 Talent).