The third and final installement in the "X" trilogy. Continued from Universe X and the Paradise X: Heralds mini-series. This volume also had a few essential specials, focussing on some of the characters from the storyline, but as much part of the main story as any other part.
These specials where;
Paradise X Special: Xen; set between issues 2 and 3,
Paradise X Special: Devils, set between issues 5 and 6,
A two-issue mini-series named Paradise X Special: Ragnarok set between issues 8 and 9,
and Paradise X Special: A set between issues 12 and the last chapter of the series, Paradise X: X .
In the first installement, Earth X, Captain America, the Fantastic Four, Thor, the Hulk and the X-Men discovered that their purpose - and the meaning of all super heroes and mutated people in the universe – was nothing more than to protect their host planet, in this case Earth, from outside invasion. They learned super heroes are merely biological antibodies to protect a growing embryo within the Earth. An embryo for the Celestial race: This is the way these Gods fought back – only to cause a terrible ecological imbalance, a rift at its core that in time would wipe out all life on the planet.
In the second installement, Universe X, Captain Marvel was reborn on Earth years after his death. But he also still claimed to walk in the realm of the unliving, where Earth's fallen champions still exist. Mar-Vell led a team of heroes in a quest for the greatest weapons of mass destruction on Earth, suggesting this would limit the destruction caused by the growing power struggle on the planet. But this was not the only reason. For his crusade on Earth only supported and armed a battle he fought in the realm of the fallen, a battle against Death herself. Those living champions who died in his collection of artifacts were added to the battle raging in this other realm. Mar-Vell led a charge against Death and killed her. But now that Death is dead, no one will ever die again. They may writhe in pain in hospitals because their bodies have been broken beyond repair, but they will not die. They will call out for an end to their suffering. They will cry out for peace but there will be no answer. Paradise will be denied them. Yes. Death is truly dead. Long live the living.
At the end of the third and final installement, Paradise X, the reader will notice that Mar-Vell remains physically alive after restoring death on our plane and when asked where he is going, he simply replies "Someplace better". Thus suggesting that breaking the unsaid rule of not bringing back the character in the medium is an unjust one.