Ann
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the wind, the sun – you need to capture a magic city with your main hero. He will enter it, leave, and they will politely ask you if you want to turn the city into a cursed one or something like that. As for the dragons, you need to level up any Necropolis hero, focusing on leadership and diplomacy, and simply add the dragons to your army. There are plenty of them on the surrounding islands; I hope you didn't kill them all? There's another way: when you curse a city, you can build a structure there that produces dragons.