[thejeff]

This is a symptom of a widespread problem in the changes in unholy/holy magic.

Short answer: get an undead priest.

Prophetize a vampire count? Or summon some cheap undead commander and prophetize him if you don't have the blood flowing yet.

Later on, Mound Kings can give you more undead priests.

Note as well if you're using both undead and non-undead sacreds, once Divine Bless has been cast, the undead priests won't bother casting unholy bless. (And probably vice versa, if the battlefield unholy bless has been cast)

I'm not sure what the real solution to this is, other than to just have the same bless work on both living and undead.
It needs to be fixed, though.