The units and structures are summoned on the battlefield by playing scrolls and all units and structures need different types of resources before they can be placed on the grid.
There are three different types of resources in the game, with each resource having a unique color, name and symbol. The green resource represented by a leaf is called growth, the order resource is a blue colored weighing scale, while the energy resource is denoted by a yellow cog.
You earn these resources by sacrifcing a scoll and this is where the strategy element comes into play. You have to choose whether to sacrifice a scroll to harvest resources or play the scroll and summon the unit or structure. The game is all about having the best combination of scrolls in your hand and also having the resources to use those scrolls at the same time.
Besides summoning units and yielding resources, the scrolls can also be used to unleash special abilites and spells which provide different types of bonues to your units, handicap the opponent's units or deal damage to them.
