A world whose casino hosts the black market dealer Haz Mazaro, where Book and Tarka sought isolynium for their weapon.
Porathia is the site of the casino in All In. Ruon Tarka needs isolynium to finish his weapon against the Dark Matter Anomaly, and he and Cleveland Booker go there to buy it from the black market dealer Haz Mazaro, who first wants Book to catch a cheater.
Michael Burnham and Joann Owosekun follow under secret orders from Admiral Charles Vance. Owosekun fights in a ring to raise money, Book wins the isolynium in a card game, and Burnham plants a tracker on it, along with buying charts that point to Species 10-C.