Star Realms Legacy (Rise of Empire): My Favorite Mechanism

About Star Realms: Rise of Empire, from BoardGameGeek:

Star Realms: Rise of Empire is a new standalone pre-quel to the popular Star Realm series game with 141 cards, and a 12-game legacy scenario campaign. Rise of Empire introduces three brand new factions: the Consortium, the Scavengers, and the Kingdom and takes players on an epic adventure over the course of 12 scenarios where players will permanently alter the market deck cards while tracking their battle wins and losses. Players will compete to achieve various objectives, earning them Campaign Victory Points and unlocking the secrets of the worlds around them. Rise of Empire can be played stand-alone or combined with all previous Star Realms content after you've finished the campaign. -description from the publisher