Metarialus is a ghostly brewer found in the basement (brewery) of The Green Ghost inn in Port Phasmatys. He plays a minor role in Ghosts Ahoy. Metarialus teaches players how to brew ale and cider (see Brewing), and has a supply of ale yeast for players to buy. Players will need to pay five Ecto-tokens and provide their own empty pot, which Metarialus will fill with yeast.