Tone of the poem le loup garou?

The tone of the poem "Le Loup-Garou" by Guillaume Apollinaire is one of mystery, dread, and a touch of melancholy. The poem describes the mythical creature of the werewolf, a man transforming into a beast-like creature under the full moon. The atmosphere created in the poem is full of dark, haunting imagery and a sense of impending danger. The use of words such as "mysterious," "shadowy," and "grotesque" contribute to the overall eerie tone of the poem.