Can a Cleric in the Realms serve two Dieties with the same Domain, say The Red Knight and Valkur, Exarchs of Tempus, as they are both gods of Strategy, one of Strategy and the other of Naval Combat with the War Domain. That's up to your DM. Some deities are close allies, but some don't like to share. And many priesthoods want full and exclusive loyalty, so a cleric with two masters would be mistrusted and never rise high in rank in either church.#Realmslore

— Ed Greenwood (@TheEdVerse) July 5, 2019