Or, well, like this:
Unit------Dark Knight------Death Knight------Champion of Darkness
Ability-------------------------Curse Strike------Zombie Strike
Ability---------------------------Dispel---------------Berserk
Unit----------Undead----------Harbinger of Death------Banshee
Ability-------Aura of Terror------Aura of Terror----------------Aura of Terror
Ability--------------------------Devastating Grasp------Piercing Wail
Ability----------------------------Unholy Word------Grief Strike
Ability------------------------------------------------------Fear Attack
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