Thank you LizardMenRule. I didn't think about the 'replace improvement with this flag' thing. I guess you could also have rare Chaos-only strategic resources ("Node of Khorne", "Node of Nurgle" etc), and tie the daemons to those. Maybe even demanding that they were located within the city radius...
Oh, and Bloodthirsters and Bloodletters are separate creatures. The first is a greater daemon, the other is a lesser one. The Balrog works very well as a 'thirster, so no need to improve anything there.
Oh, and Bloodthirsters and Bloodletters are separate creatures. The first is a greater daemon, the other is a lesser one. The Balrog works very well as a 'thirster, so no need to improve anything there.