The Fantastic War has an economic system that at first may seem like a drudgery. However many loopholes were left in the economic system that make it extremely interesting and challenging.
There are five economic units (commodities) in The Fantastic War: Food, Timber, Iron, Gold and Manna. We'll mostly concern ourselves with the first four. See Spells under Major Units for a description of Manna. Commodities have two primary purposes in The Fantastic War: Building Units and Emissarying Neutral Units. Every city has a production and a storage for all four commodities (even if it's zero). What a city produces depends on the surrounding terrain. Every square with in two squares of the city effects production in the following way: