Siren

D&D 2024 monster: Siren. Source: Tales from the Yawning Portal. challenge rating 3, creature type Fey, Medium size, speed 30 ft., swim 30 ft. Imprisoned inside a mist-filled chamber in the Tomb of Horrors, Siren serves as evidence of Acererak's heartless sense of humor. This mysterious fey creature yearns to be released, but an enchantment laid on her by the demilich prevents her from telling visitors how to accomplish that task. If anyone succeeds in freeing her, she vows to be a lifelong friend. Fey Medium 30 ft., swim 30 ft.