"Necropolis" - changes to creatures of levels 6-7.

My version
Unit ------ dark knight ------ death knight ------ champion of darkness
ability ---- curse strike ---- curse strike ---- curse strike
ability ----------------------------- zombie strike ---- dispel spell

Unit ---------- undead ---------- harbinger of death ---------- banshee
ability ------- aura of terror ---------- aura of terror ---------------- aura of terror
ability -------------------------- devastating grip ---------- piercing shriek
ability ------------------------------ unholy word or strike of sorrow