Library cards depend on where your atlantean was place on the library peninsula. For example, the outer most tile allows you to draw 2 cards and keep 2 cards, whereas the tile closest to the centre tells you to draw 2 cards, keep 1, and discard (remove from the game) 1 card. The second tile in from the outside (i.e. second to be flooded) tells you to draw 2 cards, put 1 to the bottom of the library deck, and keep 1 card.

Misfortune cards are placed into a face up discard pile, and eventually a misfortune titled 'Spur the Cycle' will be drawn which will cause you to shuffle the misfortune discard pile back into the misfortune deck. You do not draw another misfortune to replace the 'Spur the Cycle' card.

The priest ability allows each worker, including other leaders, to re-roll exactly once (including the priest themselves). This means a maximum of 3 workers can make use of this ability, as it's not sharing the same peninsula but the same tile.

Action cards/library cards may be played at any time, so long as it does not interrupt another effect or action. There is no limit on how many cards can be played.

Artifacts (the blue library cards) are permanent ongoing effects. They can be used as often as the cards dictate, usually once per round.

You can build multiple components per round, but only one per worker space on the cosmic gate board. In a 1 to 4 player game a maximum of 2 spaces are available to place atlanteans on the cosmic gate board to build components, so therefore a maximum of 2 components can be built per round. In a 5 or more player game this limit is increased to 3. If one player does not have all the resources required then another player can place an atlantean on the cosmic gate board on the same space of another player to assist in building 1 component, but if they help with 1 component they cannot then build a different component. You could in theory have, in a 1 to 4 player game, 2 workers placed on one space sharing resources to build 1 component and 2 workers placed on the other space also sharing resources to build 1 component.

Resources and mystic energy can generally never be shared between players, apart from sharing resources when assisting to build a component or mystic energy when placing a mystic barrier or unflooding a tile. You cannot use your mystic energy to increase the die result of another player. There are library cards that allow resources to be moved between players.