Chill

Phenomenon, Tessera

During every fourth week the Tinker is partly or completely eclipsed by the Sovereign, resulting in significantly shorter days and colder temperatures--20 or more degrees Farenheit in some biomes. The Chill has significant effects on many aspects of the flora, fauna, and civilizations of Tessera. For example, many animals and plants have more natural insulation (e.g., more or thicker fur, heat-absorbing chitin, heat-retaining sap).