Valerian & Laureline (english version) - Volume 21 - The Time Opener

The evil hordes of the Wolochs are rampaging through space, and everywhere
death and destruction follow. But despite the despair of some and the betrayal
of others, Valerian, Laureline and a few other brave souls are resisting.
They’re hoping to use a mysterious artefact, the Time Opener, to banish the
stones and bring back Earth. But what price must they pay to do so? And what
sort of Earth will they get back if they succeed?