Mannoroth by Koetetsu

TIER 1

Gluttony (Quest) - Collect 30 Regeneration Globes. Regeneration Globes grant 10 max Health and 1 HP regeneration/second. Up to 300 health and 30 health regen.
Reward: Regeneration Globes grant restore 100% more health and mana.

Cleaving Reach (Quest) - Destroy 100 minions or 5 defensive structures (towers, keeps or wells).
Reward: Increases The Flayer's cleave damage by 10% and increases the splash damage area by 50%.

Raze (W) - Structures hit by Rain of Fire lose 1 ammo with each hit.

TIER 2

Erode (Q) - Brutal Fissure explodes a second time after 2 seconds dealing 132 (+4%/level) damage and slows enemies hit by 20% for 1.5 seconds.

Fire and Brimstone (W) - increases the damage dealt by Rain of Fire to non-heroic enemies and structures by 50%

Echoed Howl (E) - Increases the range of howl of terror by 50% but only reduces the damage of enemies in the extended area by 15%

TIER 3

Burning Ground (Q) - Brutal fissure also covers the area with flames that deal 120 (+4%/level) damage over 4 seconds.

Soul Drain (E) - Gain a shield equal to 6% of your health for each enemy hero hit by Howl of Terror.

Headlong Rush (Z) - Increases charge range by 1 and your next basic attack deals 50% more damage after charging an enemy.

TIER 4 (See Heroic Abilities)

TIER 5

Corrupting Fire (W) - Burning enemies are slowed by 20%.

Deep Breath (E) - Adds a 0.5 second delay to Howl of Terror but sucks in enemies in range during that time.

Enraged Regeneration - Activate to instantly heal you for 15% of your max HP and an additional 20% over 10 seconds.

TIER 6

Seismic Spike (Q) - Now creates a wave of rock spikes that knocks enemies into the air for 0.5 seconds and deals an additional 50 (+4%/level) damage when hitting the ground. (note: applies the slow/stun after hitting the ground)

Shattering Rain (W) - Adds an additional wave of Fire and each hit decreases the armor of enemies by 5.

Unstoppable Charge (Z) - Become unstoppable for 1.5 seconds when charging an enemy.

TIER 7

Blood Bath (See Heroic Abilities)

Lingering Shadow (See Heroic Abilities)

Reincarnation - If Mannoroth dies with at least 100 mana left, His death timer is reduced by 50%.

Decimate - You may now activate The Flayer to increase your next basic attack damage by 100% (15 second cooldown) and passively increases basic attack damage by 20%.

- Ability animation concepts:
Brutal Fissure was meant to look like the attack he made on thrall that sent him flying away in the Warcraft III cinematic.