Element
Sorcery: Contested Realm is built around the four classical elements: Air, Earth, Fire, and Water. To cast spells, you'll generally need to have elemental affinity. A spell is an air spell if it requires one or more air threshold, e.g. Apprentice Wizard, or has an air frame, e.g. Castle Servants. Earth, fire, and water spells are determined in the same manner. If a spell requires multiple different elemental thresholds, e.g. Purple Knight, it is each of those elements. Knowing the element of a spell is relevant for cards like Lava Salamander, which can only cast fire spells and takes no damage from fire spells. A site is an air site if it provides one or more air affinity. Earth, fire, and water sites are determined in the same manner. If a site provides multiple different elemental affinities, e.g. Ruins, it is each of those elements. Knowing the element of a site is relevant for cards like Avatar of Earth, which specifically looks for earth elemental affinity on sites.
Sub-entries
Air
Air is the element of knowledge and power, dabbling in forces beyond mortal control to acquire the magical means to respond to any battlefield situation. An attunement with air grants you both mobility and tactical options thanks to its ability to teleport units around the realm and to increase its available spells.
Earth
Fire
Water