Call of the damned

at the start of combat the death knight can let out a horrid shriek within 100ft of the death knight who lets out this shriek any dead creatures are raised and compelled to follow the death knights will any Non combatant living creature will become automatically frightened constructs are immune to the effects also if they are immune to frighten
also any creature who hears the call and passes the saves will automatically know its a death knight 1d100 for searching for a buried bodies

The death knight lets out a horrid shriek that to all creatures that
hear it fills them with a sense of the grave and of doom all non combat npc who hear this are immediately feared for 1d4 hours 
roll 1d4 for the type of undead they last for 1d4 hours after the feat is active it can only be used once per day
4= death knights roll a d10 for amount of death knights
3 =  banshees d20 for amount of banshees
2 =Ghouls d100 for amount of ghouls
1=skeletons d100+20 for the amount of skeletons