Then There was a Big Brown Dinosaur

The Nameless, Trailblazers who travel around the vast cosmos via the Astral Express, saving countless others along the way, were just minding their business until a certain humongous dinosaur was right beside their train. (The art used to create the cover isn't owned by me)

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(Ben 10 and Honkai: Star Rail are owned by Man of Action and Hoyoverse respectively)