Anyone else who wants to get into this, but doesnt have heroes of horror
And p 294 dmg
Beginning at 5th level, a dread necromancer radiatesa 5-foot radius fear aura as a free action. Enemies in the area must succeed on a will save (dc 10+1/2 her class level + her cha modifier) or become shaken. A creature who successfully saves cannot be affected by that dread necromancer's fear aura for 24 hours.
And p 294 dmg
Becoming even more fearful" Fear effects are cumulative. A shaken character who is made shaken again becomes frightened, and a shaken character who is made frightened becomes panicked instead. A frightened character who is made shaken or frightened becomes panicked instead.