Literarosphere
One of the many, many semi-apocalyptic devices constructed by Kelorna the Extremely Confused over the years, the Literarosphere was a compendium of knowledge intended to provide a companion perspective to the Codex Ingenuous. The exact technical specifications of the device remain mercifully unknown, but it's likely that it functioned similarly to a brainsplainer, as the brainsplainer development process began with salvaged pieces of the Literarosphere. However, Kelorna's intent for the device is on record:
Mwa ha ha! For too long, that fool Guage has hidden the secrets of the Codex from me! But he was too short-sighted, for merely relocating the Codex[1] is not enough to stop me from collecting all of it and seizing the Great Secret! With this device, I shall reach into history itself and reconstruct the Codex—and THEN, I shall RULE THE WORLD! BWA HA HA HA! COWER, MORTALS! COWER AND BEHOLD![2]
Unfortunately, while it seems Kelorna intended the Literarosphere to view the historical record passively, it the device was actually able to effect changes in the past—a possibility it appears she did not consider. Naturally, the device subsequently exploded. It is impossible to prove which changes occurred as a result of the Literarosphere, as at this point they have always been as they are, but it is a safe bet that any use of unanimite before its invention in 1901 is the result of temporally-displaced fragments of the Literarosphere.
The Literarosphere was built after the failure of the Omnihammer (a device to turn everything into nails), and was followed by an unnamed and swiftly abandoned plot to "drown the world in syrup".[3]
Yedevek Ilron, Bardslayer 2nd class
[1] Kelorna refers here to the then-recent theft of half the Codex by Thrognurith the Dragon Rider. No connection between Thrognurith and Guage has ever been proven, and given Kelorna's characteristic paranoia, it is generally assumed that Guage (circa 2nd century) had little or nothing to do with the theft (which occurred in the 18th century).
[2] As quoted in "Until the End of Time": A Brief Biography of Kelorna the Extremely Confused, Vol. III (Abridged Version) by Dr. Sid Martius, p. 859. Emphasis his.
[3] Ibid, p. 1003.