Death Coil

Death Pact Kills a target friendly unit, giving a percentage of its hit points to the Death Knight.

Unholy Aura Increases the movement speed and life regeneration rate of nearby friendly units.

Animate Dead (Ultimate) Raises 6 dead units in an area to fight for the Death Knight. Animated units are invulnerable.

My second favorite hero he is strong and mighty and good skills and is a good ascet to the army of any one he skills are 

Impale Slams the ground with the Crypt Lord's massive claws, shooting spiked tendrils out in a straight line, dealing damage and hurling enemy ground units into the air in their wake.

Spiked Carapace (Passive) The Crypt Lord forms barbed layers of chitinous armor that increases its defense and returns damage to enemy melee attackers.

Carrion Beetles (Autocast) The Crypt Lord progenerates 1 Carrion Beetle from a target corpse to attack the Crypt Lord's enemies. Beetles are permanent but only 5 can be controlled at a time

Locust Swarm (Ultimate) Creates a swarm of angry locusts that bite and tear at nearby enemy units. As they chew the enemy flesh, they convert it into a substance that restores hit points to the Crypt Lord when they return.

The lich he is very powerful but not one of my favorites his skills are

Frost Nova Blasts enemy units around a target enemy unit with a wave of damaging frost that slows movement and attack rate.

Frost Armor (Auto Cast) Creates a shield of frost around a target friendly unit. The shield adds armor and slows melee units that attack it.

Dark Ritual Sacrifices a target friendly unit to convert its hit points into mana for the Lich.

Death and Decay (Ultimate) Damages everything in its area of effect by 4% of its base hit points per second.

The draedlord is a good hero but not my favorite and i think he kinda sux but here are his skills

Carrion Swarm Sends a horde of bats to damage enemies.

Sleep Puts a target enemy unit to sleep. A sleeping unit can be awoken by attacking it.

Vampiric Aura Nearby friendly melee units gain hit points when they hit a unit.

Inferno (Ultimate) Calls an Infernal down from the sky, dealing 50 damage and stunning enemy land units for 4 seconds in an area. The Infernal lasts 180 seconds.

Well Thats all of the undead heros and ive shownen you all my faorites for best to least so thank you for lookin