One, scourge from a level 51 necro is nigh impossible to cure. With anything other than healing sleep. Seriously, I burned through 24 gold once when Tavlin scourged me, and I have horrid memories of failing about 90 com 'cure disease' from Nysrogh's scourges.

And two, I'm 90% positive mummies can get a fear affect from one of their core class skills/spells.