For the Ursun Revivalists, Supporters can earn closer relations with the other two big factions, along with bonuses, and they add Supporters to the Ice Court.
Gold and Devotion can also be spent to limit the rival Kislevite faction's Supporters. The more Supporters your faction gains, the more likely will minor Kislevite factions want to confederate with you. The Ice Court and the Great Orthodoxy compete for Supporters, a second unique resource for Kislevite factions.Devotion is also spent to construct some higher tier buildings. Devotion is primarily spent on performing one of four rituals to the Motherland, which provide powerful bonuses and invoke the four main Kislev dieties: Salyak, Dazh, Ursun and Tor. If Devotion gets too low, such as by attacking other Kislevite factions, Chaos armies will be more likely to attack you.