[Forrest]

How about a province conversion stealth preacher. He moves in a simply causes them to rise up and change Gods?

How about a national summons by the preachers? He converts the province and can summon units through prayer. Maybe stealthy and commanders at higher lvls. Holy units. An angelic army thing.

Could do multi turn summons for higher etheral, awe type units. Just when you think their down they pop up out of nowhere.

A raiding unit from on high rather than hell. Your PD becomes theirs on conversion.

Probably based on a home province preacher unit.

Antiblood and death nation.