Star Wars X-Wing (2nd Ed): Epic Battles Multiplayer Expansion - Rules of Play says:

Featuring eleven cinematic scenarios, Epic Battles gives players the chance to fly coordinated wings of starfighters into a wide variety of situations. From desperate defensive actions to daring assaults on enemy fortifications, each scenario creates an exciting X-Wing experience. Within this expansion, you'll find five wing tools, eight upgrade cards, seven Wing Quick Build Cards, and everything else you need to stage your own epic X-Wing battles!