Each Age, you will be playing Dynasty cards. Each one of these cards represents a family member of a particular Dynasty - an individual of great prowess who will lend you their aid in leading your nation to glory! These cards set off powerful effects that can generate resources, victory points, (sometimes both!) as well as other effects that give you a big boost during your turns. Additionally, the order in which you play these cards over the course of the game is important, as it represents the Dynasty that will be leading your people through the Ages and you gain extra points by collecting sets!
When playing with Dynasties, you'll be drawing Dynasty cards at the start of each Age and drafting them. There's a deck of cards for each Age: I, II and III, each with exponentially greater abilities. Each player draws 4 cards and chooses one before passing the remaining cards to the player on their left. They then take the three cards from the player on their right and choose another card to keep. This is repeated one last time so that all players have 3 Dynasty cards in hand. All unused cards are then returned to the box.