Fornyrðislag is an ancient Norse poetic form characterized by its use of alliterative verse. It typically consists of lines divided into two half-lines, each containing two stressed syllables. The rhythm is created through the repetition of consonant sounds at the beginning of words, which adds a musical quality to the poetry. This style was commonly used in Old Norse literature, particularly in Eddaic poetry and sagas. It often conveys heroic themes and stories, reflecting the values and culture of the Viking Age. The structure allows for a powerful and evocative expression of ideas and emotions.