The Ancient Knowledge: Heritage expansion consists of two elements:

16 solo mode cards that allow you to play a campaign. You choose 1-5 objectives, placing them in the artifact slots on the player board (and thereby denying you the potential use of artifacts!), and whichever objectives you complete become powers that you can employ in future games.

36 new builder cards and 12 new technology cards that you can shuffle into the decks, making them 25% larger.