Do This. Not That.

Quest: Root enemy Heroes with Howling Blast. Reward: After rooting 5 Heroes, Howling Blast's cooldown is reduced by 2 seconds. Reward: After rooting 10 Heroes, Howling Blast's range is increased by 20%. Reward: After rooting 20 Heroes, Howling Blast also roots enemies in its path.

Frozen Tempest Mana cost reduced by 2 per second. Quest: Damage enemy Heroes with Frozen Tempest. Reward: After damaging enemy Heroes 150 times with Frozen Tempest, the Movement and Attack Speed Slows of Frozen Tempest last an extra 1.5 seconds against enemy Heroes.

Activate to gain 25 Armor, reducing damage taken by 25%, and reduce the duration of Stuns, Slows, and Roots against Arthas by 75% for 3 seconds.

Summons Ghouls that last 15 seconds and attack for 20 damage. Sacrifice Ghouls to heal for 267 Health.

Enemy Heroes hit by Howling Blast have their Armor reduced by 15 for 4 seconds.

Death Coil deals more damage and heals more the lower Arthas's current health is, to a maximum of 100% bonus damage and healing.

3 additional Ghouls are created. Ghouls deal 50% more damage, heal for an additional 50% and last 5 seconds longer.