Level 1:
Plague (Q): Quest: Kill 30 Minions with Disease Cloud. Reward: Increase the size of the poison cloud by 30%.
Quick Death (Q): Quest: Kill 30 Minions with Disease Cloud. Reward: Increase the damage of the poison cloud by 40%.
Resilience: Quest: Collect 20 Regen globes. Reward: Activate to gain 20 Armor for 3 seconds. Cooldown: 30 seconds
Level 4:
Lasting Disease (Q): Disease Cloud now applies to 2 corpses.
Greater Barrier (E): Flesh Barrier is now twice as wide and lasts 4 seconds, but requires 2 corpses.
Fast Thrower: Quest: Hit 30 enemy Heroes. Reward: Increase your attack speed by 20%.
Level 7:
Flesh Protect (E): Casting Flesh Barrier also gives you a shield for 2 seconds.
Expanded Storage (D): Increases the maximum number of corpses to 9.
Improved Wheels (Z): Reduces the cooldown of Unholy Speed to 30 seconds.
Level 10:
Rain of Corpses (R1): Fling all stored corpses in quick succession, dealing 50% increased damage per corpse.
Revive (R2): Upon landing, corpses are revived as Zombies, attacking the nearby enemies for 5 seconds. Lasts 7 seconds.
Level 13:
Healing Microbes (Q): You are healed for 20% of the damage you deal with Disease Cloud.
Fast Refill (W): Exhume Corpses no longer requires channeling.
Catch This (E): Casting Flesh Barrier on an enemy Hero will knock them back.
Level 16:
Deadly Poison (Q): Hitting an enemy Hero with Disease Cloud increases the damage of the next Disease Cloud by 10%. Stacks up to 30%.
Corpse Abudance (W): Exhume Corpses now pasivelly generates 1 corpse every 10 seconds.
Catapult Master: Hitting 2 enemy Heroes with a single corpse increases your attack speed by 35% for 4 seconds.
Level 20:
It's Raining Corpses (R1): Increases the speed of firing and the damage by 20%.
Zombie Army (R2): Increases the damage of Zombies by 25% and the duration of Revive to 10 seconds.
On a Roll! (Passive): Increases your movement speed by 21%. Each corpse stored reduces this bonus by 3%.
Insulation (Passive): You gain 3 Armor for each corpse currently stored, up to 21 Armor.
Heroes of the Storm Build Guides
The number of corpses hes allowed at once is a bit iffy though, and it would be nice to get a stat line instead of just his auto attack speed. What is his health like? Basic attack damage? Base movement speed?
Yeah, I wasn't sure whether he should get more maximum corpses, so I gave him the ability to restore corpses and a talent to increase the maximum to 9. Maybe I'll revisit it and change some stuff.