Star Trek Expanded Universe
You may also be looking for Deus Ex Machina.

Deux Ex Machina is Star Trek: The Excalibur Epics's contribution to the first part of the Star Trek: Unity (crossover) series.


The mystery of a derelict Federation starship takes the USS Excalibur to the Guardian of Forever where they encounter a powerful, new enemy whose goal is the complete domination of the entire galaxy.

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