Promised Land
Very rare2.2%ObjectiveOptionalSingle-player
Permit a group of religious exiles to settle in your realm
Needs All Under Heaven. Two routes: a random event that can fire while playing anywhere in Asia, or just take the Invite Religious Exiles decision yourself. Either way it's a freebie that falls out of any Asia campaign of reasonable length - stack it with Stamp of Approval and friends rather than making a trip for it.