Time changer

The time changer was a piece of technology, designed to be used with a transporter, for the purpose of experimental time travel. Utilizing bioelectronic crystal, the device was theorized by Federation scientist Georges Mordreaux in the 2260s decade, but development was halted in the year 2270 due to a flaw referred to as the entropy effect.

History and specifications
Using special crystal parts, Professor Mordreaux managed to complete equations to pair a portable device with a control device wired into a transporter console. The portable device would allow a person possessing it to be transported through time while the console portion would allow them to be retrieved to their origin point.

Due to flaws in the equations as they related to the fabric of space and time, use of this device proved to be highly dangerous. An initial experiment of sending a group back in time was planned, but the sudden arrival of persons from a catastrophic series of alternate futures convinced Mordreaux to stop the initial test. The reasoning provided by Spock and several future version of Mordreaux was that entropy became enhanced with each subsequent use of the device, causing the onset of naked singularity formation and the heat-death of the known universe by the mid-24th century.

Even with the aborted test, the temporal incursions into Mordreaux's laboratory in 2270 caused the formation of some singularities near his laboratory on the Aleph Prime asteroid habitat. One such singularity was investigated by Starfleet, ordering the USS Enterprise (NCC-1701) (and Spock specifically) to orbit and analyze the spatial anomaly. After a long and stressful orbit required for Spock's observations, the future Spock became merged with his past self, collapsing from exhaustion and physical stress from weeks without sleep combined with the deleterious effects. Spock offered no explanation to his comrades about the injuries he received fighting the maddened future Mordreaux, or the ruined time changer device found in his observatory, but concluded the analysis of the naked singularity with the welcome news that the effect would not expand beyond the single black hole that resulted from the completed time travel journey.