Base creature: Hydra (CR 8) This terrifying multi-headed beast stands in a swampy, mist-shrouded environment, its numerous heads hissing and snapping. Its scales are a deep, murky green, and scarred from countless battles. A faint, venomous aura emanates from its gaping maws, hinting at its potent acidic breath. The Hydra's body is powerful and serpentine, coils half-submerged in the bog, as if ready to strike at any moment.