It is hard to say much about the Pre-Entities, save that they existed. As the existence of the Moon can be proven by ocean tides, we extrapolate much of what we know about them by the effects of their one-time presence.

They left the gates of the Interworld Tree, and their knowledge in the form of touchstones. From the size of the gates we can guess that they were roughly elephant sized, for that is the smallest of the gates so far discovered. The gates allowed the Pre-Entities instantaneous transport between worlds, although transport may not be the correct world, the physicist-philosophers among the Lifeweavers think the gates connect planets the same way your garage door allows you to access your car without the tedious trip outside.

The touchstones are even more fascinating, and equally more dangerous to use. They are nondescript stones, usually triangular, which pass their knowledge to one who touches them in a flash. This instantaneous download, to use a late twentieth century term, is enough to overthrow almost all human minds and even the Lifeweaver's formidable intellects. But for those who experience what can only be described as a revelation with reason intact, an impression of the Pre-Entities remains: that of sightless, giant wormlike creatures with a manipulative fringe of short tentacles surrounding their maws, and a confusing group of multiple brains each with distinct personalities and functions. But perhaps the multiple brain impression is a false one, for it is thought that the Pre-Entities communicated telepathically.

Now we must delve into realms that even the science of the Lifeweavers has not yet fully explained. The Pre-Entities fed off of the vital auras of living cell matter. The amount of auric energy obtained from a being depended on two things: physical size and intelligence. Thus a mouse is more nutritious in terms of vital aura than an oak tree, and a chimpanzee outweighs a bull in terms of his vital aura.

A thing that feeds off vital auras achieves near immortality. It is believed the Pre-Entities had lifespans of millions of years. And therein was their downfall, for their protracted lifespan forced them to stop reproducing to keep from exhausting their food supply. And since the gulf between near immortality and immortality is as infinite as the definition of pi, they began to die out. More and more vital aura was required to maintain the Pre-Entities in the twilight of their long lives, and the fear of death in beings which have lived so long can only be postulated. They went out in a final orgy of self-destruction, depopulating worlds as they scoured them clean of life. It is thought that the dinosaurs on Earth disappeared in the waning of the Pre-Entities. Finally they turned on each other in their last need. Whether the last Pre-Entity left a touchstone with its final thoughts is unknown, but the Lifeweavers think it would be a fascinating experience and the ultimate find. I personally disagree, believing its final thoughts might have been as sad and simple as Dr. Seuss' Once-Ler's from The Lorax.