TETHER Tether

United Human Calendar Year 4701.
Almost 5000 years after humans discovered they were not alone in the universe and began their long war with the other two intergalactic civilisations of Draconians and Dwarves.
Suddenly, a sound seemingly as though reality itself was being torn apart was heard by every single intelligent life-form in the universe before a voice followed.
The voice told them that it would create a virtual platform called Tether, where all the rates would conduct their conflicts with each other. From now on, any large-scale massacres or wars between the civilisations, which could regress the technological, cultural and intellectual progress of the civilisations would be considered treason, and they would be erased.
to prove its point, the voice declared a leader from each of the three civilisations; who had conducted such massacres, as dead, and they died instantly, along with all their wealth and belongings.
20 years later, the entire universe is playing the game, not only due to being forced to do so by their governments but also the various rewards, both monetary and otherwise found inside.
Jack, a normal human who lost a large part of his family, enters the game after a few years in the military, and a few months of being a free mercenary.
However, he comes across a 'stone', which is both a blessing and a curse, giving him incredible powers in the game, but also making him the target of all the powerful and influential humans and other species.
Ultimately, all the powerful humans band together, and first rip away his guild from the inside, before laying siege to his home base and finally seizing the item by killing him.
...
However, the 'stone' seems to have powers beyond the game and brings Jack back to his past before he lost his family.
What will Jack do? And how will he get revenge on those who caused him harm?