Board Thread:The Last Sovereign Discussion/@comment-27713488-20180615004848/@comment-27713488-20181023061845

Here's a speculation based on not one but two minor conversations. Carina mentions during one of the Megail's route campfire scenes that the war drained energy from the Incubus King's lands, making it a wasteland and not merely a natural desert. So one plot point may be finding a way to reverse this faster than nature would. Furthermore, in a conversation between Robin and Sho during the Third Arclent War, Sho reveals that she was working on agriculture and soil projects, so she may be involved in related research.