MOM improves upon MOO by allowing to control and direct the construction of different building in a particular city. Each building performs a specific function, such as increase your food production, spell research, gold income, or allow you to train more advanced military units. The Gathering , as well as some of its own unique spin-offs on spell research and spell casting. Basically, magical power is treated as a tangible resource, and can be harvested and stored in the form of 'mana'. Mana in turn can be spent on spell research, spell casting, or improving your wizard's general spell casting ability.
Tactical combat is another area which is much improved and very well done.
There is a large selection of unique military units to train, scores of magical creatures to summon, and a slew of powerful heroes to lead against the opposing wizards or natural denizens of the land. The ability to cast spells during combat adds another element of strategy, making combat one of the most enjoyable potions of the game. MOM does a very effective job of bringing miniatures combat to life. For fans of Warhammer and such diversions, you'll love seeing your army scuttle around at the click of your mouse in a game of the pre- Warcraft era. As in MOO , the sheer volume of options and variety can be overwhelming at first.