Abaddon, Lord of Avernus

A coil of death that can damage an enemy unit or heal a friendly unit at the cost of his own life.

Level 1 - Heals or Damages for 100 HP. Deals 50 HP to himself.
Level 2 - Heals or Damages for 150 HP. Deals 75 HP to himself.
Level 3 - Heals or Damages for 200 HP. Deals 100 HP to himself.
Level 4 - Heals or Damages for 250 HP. Deals 125 HP to himself.

Cooldown: 7

Level 1: 75 mana, 7 sec cooldown.
Level 2: 75 mana, 7 sec cooldown.
Level 3: 75 mana, 7 sec cooldown.
Level 4: 75 mana, 7 sec cooldown.

Summons dark energies around an ally unit, creating a shield that absorbs a set amount of damage before expiring. When the shield is destroyed it will deal damage equal to the amount it absorbed to an area around it. If cast on self while using borrowed time, the damage you take will heal you. Removes certain types of negative buffs on cast. Lasts 20 seconds.

Level 1 - 125 damage.
Level 2 - 175 damage.
Level 3 - 225 damage.
Level 4 - 275 damage.

Cooldown: 23 seconds.

Level 1: 100 mana, 23 sec cooldown.
Level 2: 100 mana, 23 sec cooldown.
Level 3: 100 mana, 23 sec cooldown.
Level 4: 100 mana, 23 sec cooldown.

Abaddon strickens an enemy with Frostmourne's chilling power on each attack, causing all units who attack the slowed enemy to gain 10% increased movement speed, along with faster attack speed, for a limited time.

Level 1 - 10% increased attack speed, slows enemy by 5%.
Level 2 - 20% increased attack speed, slows enemy by 10%.
Level 3 - 30% increased attack speed, slows enemy by 15%.
Level 4 - 40% increased attack speed, slows enemy by 20%.

Passive

When activated, most negative buffs will be removed and you will no longer take damage for the duration of the ability. If the ability is not in cooldown, it will passively activate when your hitpoints drop below 400.

Level 1 - Lasts 3 seconds.
Level 2 - Lasts 4 seconds.
Level 3 - Lasts 5 seconds.

Cooldown: 45 seconds.

Level 1: 0 mana, 45 sec cooldown.
Level 2: 0 mana, 45 sec cooldown.
Level 3: 0 mana, 45 sec cooldown.