Sinaht Irithyl was the chosen heir of Sakrattars Irithyl, and the third Coronal of Cormanthyr from -1950 DR to his death in -1338 DR. He became coronal upon drawing the Rulers' Blade after the former coronal's death. His rysar was known for a successful campaign against the drow of the Twisted Tower and the former realm of Uvaeren in -1354 DR, which utilized the combined forces of Cormanthyr and Rystall Wood to rout many of the dark elves from the woods. Unfortunately, they failed to penetrate the Twisted Tower, and many drow managed to escape into the Underdark.