Gigantic chaos monsters with multiple heads on serpentine bodies. * Known Greater Hydras include: * The Double Hydra of Mirelos * The Green Pyrohydra of the Loral Isles * The Orange Pyrohydra of Mirelos * The Rainbow Hyrda of Jolar * The Hydra of Dragon Pass * All greater hydras save the Rainbow Hydra give birth to Lesser Hydras Source: Guide to Glorantha