Your first objective is to establish a sustainable kingdom by collecting resources. This is done by building facilities and capturing land that increases your production rate. Players are also given the optional choice to purchase in game boosters from the shop that can speed up your normal rate of production.
In addition to collecting resources, you will need to collect monster and commander cards. These cards are used to create armies known as Units, and are the key foundation to expanding and protecting your kingdom. Cards are often collected through Packs - cards that are randomly drawn in exchange for in game currency in the Shop.
Once you've established a good foundation of resources and units, it's time to engage in some combat. Monsters that are lost in battles will need to be produced again, so be sure to start with the lower level territories and send scouting units first.