Gul'Dan by Cookie

Regenerate 7 health every time an enemy minion dies in a 20 yard radius and 20 health every time an enemy Hero dies within a 25 yard radius

Pulse Demonic Hellfire in a 20 yard radius around you that deals 20 damage/pulse to enemy minions and 40 damage to enemy heroes.

Cooldown: 8 seconds
Cost: 40 mana to toggle, 20 health/pulse

Imbue a target ally Hero with the Fel power of Mannoroth, giving them 15% attack speed and 10% attack damage at the cost of losing 10 health every second for 15 seconds.

Ability cooldown: 20 seconds

After a short delay, fire a bolt of fel energy in a line dealing 70 damage to minions/buildings along its path. Upon impact with an enemy, the bolt deals 100 damage and slows surrounding enemies.

Cost: 80 mana
Cooldown: 15 seconds

Summon a deadly rain of Infernals in a target 50 yard radius. Upon Impact, the infernals deal 60 damage in a smaller radius and stun enemies and attack them for 3 seconds.

Cost: 150 mana, 20% of current hp
Cooldown: 130 seconds

Channel your vital energy to empower your abilities. While under the effect of Life Tap, gain increased ability power and lowered cooldowns on your abilities at the cost of health.
You gain 30% additional ability power and your cooldowns are reduced by 40%.

Cost: 20 life/second
Cooldown: 8 seconds