Cthulhu Wars: Great Old One Pack One adds five new Great Old Ones to the base game, letting each faction claim them based on arrival order. If you’re the first to awaken Mother Hydra, nobody else can use her unless you defeat and reawaken her. Each Great Old One brings a unique ability and a separate spellbook that can be earned during play. Abhoth, for instance, lets you place Filth tokens that participate in battles and increase the map’s corruption. Chaugnar Faugn gives you the Miri Nigri action, which starts a battle in a chosen area and boosts your cultists’ combat by +2. Cthugha transforms battle results into Elder Signs, generating power points when you damage yourself. Mother Hydra can capture enemies from the sea and spawn cultists en masse with her Zygote spell. Yig makes your cultists poisonous, killing enemies that eat them, and his spellbook forces opponents to choose between donating power or accumulating doom points. The game keeps the action‑point, area‑movement, dice‑rolling, and variable‑player‑powers mechanics, creating a tense and strategic experience. Components include detailed miniatures, power tokens, filth tokens, and spellbooks, all scaled to bring the setting to life. The cosmic horror atmosphere and the need to master each Great Old One’s resources make this pack an exciting addition for those who already master Cthulhu Wars and seek new layers of complexity and drama.