Promo 01 for Underwater Cities. Given out at Essen SPIEL 2018 and included in some versions of the base game. Contains the promo card 'Biodome' and one green plastic dome token. --- Card text Biodome If you are the first player to have 3 cities connected to your network, replace your starting city with the green biodome. This is a nonsymbiotic city that requires no kelp at the end of production.