Underwater Cities

No — structures and cities that are not connected to your network do not produce, do not consume kelp at Production, and do not count during final scoring (pages 6, 8, 9).

Yes — when building a tunnel, building, or city any part of the cost that requires kelp or steelplast may be paid with biomatter instead (page 6).

You must discard down to 3 cards at the beginning of your turn and at the beginning of each new era; at the end of your turn you draw 1 card and the official discard decision is made at the start of your next turn (pages 8–9).

If the card color matches you may choose to resolve the card effect before or after the slot action, but you must fully resolve one set (card effects) and then fully resolve the other (the slot action); any new triggered effects that occur must be resolved immediately when they trigger (pages 5, 7–8).

Action cards are claimed cards that provide extra actions usable only when you use an action slot or a card effect that permits using an action card; each action card can be used once per era, and you are limited to four action cards total (your Personal Assistant counts as one) (page 5; see also page 7).

First spend all kelp; for each remaining unfed city pay 1 biomatter, and if you still have unfed cities you must pay 3 points per city (cities not connected to your network require no food) (page 9).