A thrilling space-based campaign for the world's greatest roleplaying game. Home of the stars and gateway to the heavens, the Astral Plane teems with excitement and possibility. With the help of magic, spell jammers can cross the oceans of Wildspace, ply the silvery void known as the Astral Sea, and hop between worlds of the D&D multiverse. This collection contains everything a Dungeon Master needs to run a campaign set in the starlit realms of Wildspace and the Astral Sea, as well as new options for players who want to create characters at home in this fantastic setting.