Rhaymon was a young cleric of the god Lathander in Shadowdale during the Time of Troubles. He met and befriended the then-mortal Kelemvor, Midnight, Cyric, and the ex-cleric Adon when they arrived in the dale to seek advice from Elminster Aumar. Later Rhaymon fought against the armies of Bane.
After the battle, however, when all believed Elminster dead, Rhaymon came to believe that Adon and Midnight were the culprits and testified against them in the process.
Some time later, Rhaymon died from an accident and Midnight met his spirit on the Fugue Plane and he gave some advice to her about Myrkul's realm.