From the back cover:
Intergalactic empire building, a magic system that marches to that proverbial different drummer, and a choice of player-character species including amorphous blobs, snakelike bipeds, and purple-scaled, four-armed powerhouses; these are just a few of the elements included in this Universe Book designed for play in the Amazing Engine game system. All the rules you need to enjoy adventures set in the Morione Domain are included in this booklet. You must have the System Guide in order to play.
The System Guide was added into the contents at the last minute. TSR published a half-page ad in Dungeon and Dragon magazines pointing this out.