From the Introduction: The Star Elf Guardian army book requires the Star Confrontation rules book in order to play. Star Elves are master snipers that use crossfire to tear enemy forces apart. Star Elf worlds have limited population so drones make up most of their military forces. These fearless robot warriors are tough as nails and each provides a special ability to their squad, making Drone Squads one of the most versatile and durable squads in the game.