Quote Originally Posted by ChumpLump View Post
*Re-reads ur-priest class.*
How is this?
Special: The character must have no ability to cast divine spells.
Ur-priests cast divine spells.

Obviously, this is meant only for preexisting abilities, but strict reading of RAW* gives no such exception.

It's sort of like the Schrödinger's Dragon Disciple case.

(*Provided one accepts Complete Warrior and Complete Arcane's "if you no longer meet the requirements of a PrC you lose access to its class abilities" rule extends to other Prestige Classes.)