Vyl is sometimes referred to as “the fifth Suul,” “Vyl the Lonely,” or “Eyd-Suul” (meaning “Mother-Suul”.) She is responsible for the creation of all mortal life. Her early experiments created spectral creatures composed primarily of magic (Ul’s soul, also referred to as “Ye”) and little matter (Ul’s body, also referred to as “Wu”.)
She created many different types of creatures before and after she created the folk, all containing varying balances between Ye and Wu. Not all are known: some may have been created on other worlds. Though folk are primarily Wu, some have a particularly strong presence of Ye.