Hmm... Tempted to pick up Landlord. But instead of one massive fortress, the Shadow Queen would have a small building located in several (would have to number crunch on how many I could get) major/capitol cities across the material plane. She would have her succubi lead men through the building, which would connect to her plane, and there they would have their souls taken and be used to impregnate as many succubi as possible before they died. The idea is to play the long game with that- Building up an army of half-fiends and teaching them the Shadow Hand style and also having them worship the Shadow Queen as a goddess.<br/><br/>The idea would be to play the long game, waiting until the half-fiends are old and strong enough to fight then using them to conquer/convert areas of the material plane.<br/><br/>Also, what would be the soul price of getting the unique ability of my original (well, second) demon lord? Black flames that she can add to every attack that deal 10d8 abyssal fire damage + 1 vile damage?