OK, I understand.
I was thinking something like this:
Precursor Remnant:
Dead World:
While an initial survey of the planet deemed it to be one of the myriads of rocks without the potential to bear life, a closer survey revealed interesting features. A series of Large impact craters dot high ridges surrounding large desiccated basins, but closer analysis reveals a network of maglev lines connecting these craters, indicating that they may have once been the sites of large Populations Centers. Some Ancient force Took it upon themselves to destroy the inhabitants of the planet, and then, in a last act of Pique, stripped the planet of it's atmosphere, it's ability to bear life.
Too long? Too melodramatic? Not enough effect?