There are 4 types of cards. You can tell the type because it says it on the card description. They each have a different symbol on the card icon.
Creatures can move around the map and can attack other Creatures and Buildings.
Buildings are also placed on the map. Buildings are very important since that is generally how you get domain and they determine your area of control. When Buildings or creatures are on the map they are called Figures. Figures can take damage and can attack other figures if they have an attack value.
Spells affect the world instantly. They can do things like kill a creature, give you flux, teleport a creature, etc.
Enchantments also stick around like Buildings and Creatures. There are 3 types of Enchantments. Enchantments on Figures, spaces of the map, or the whole world.