A

  12 Ga(Billion years)

  A galaxy is giving off less light that it should.But at a closer look the stars are there,there is just something blocking their light

  Its as if their energy is being harnessed

  100 Ta (Trillion years)

  Star formation ends, Galaxies slowly die as interstellar gas is exhausted.All high mass stars are already dead and only low mass stars remains

  Something is pushing these remaining stars to their doom.Pushing them closer to the giant Super Massive Black Hole that is still in the middle of the now fading galaxy

  The culprits are Stellar Engines, giant machines capable of moving entire stars using their own light as thrust.These Stellar Engines have enough mass that it is also attracting the star with its own gravity

  These stellar tow trucks are moving slowly through space but eventually,after a billion years, these engines will be traveling in space at relativistic speeds

  These stars will be dump into the black hole and a dyson sphere like megastructure surrounding the black hole will capture the kinetic energy of the mass as it plummets down into the black hole.

  They are hoarding energy,like how animals store food before winter.These black hole miners are preparing for winter, a very cold and long one

  120 Ta

  The universe is dead,dark and cold.A universe filled with white dwarfs,neutron stars and black holes

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  A universe devoid of star, but not of life

  A giant ring surrounds a gigantic black hole.

  The Black hole miners now uploaded their conciousness inside a giant computer and is in a state of hybernation.Using as little energy as possible, this giant computer harnesses the Hawking Radiation emitted by the Black Hole

  This state of hibernation continued for a very long time

  The Black Hole miners are now scurrying to find ways to escape their dying universe, or to save it.At any cost even if it means destroying others

  The super cold universe makes computation a lot faster, they're now using their precious hoard of energy.Slinging themselves closer to the Black Hole's event horizon slowing the flow of time for themselves

  Simulating entire universes searching for the answer that will allow them to escape the increasingly hostile universe

  The miners have now discovered a way to punch a hole straight to their universe's "daughter" universe

  They start to devise a plan :to leave or to stay

  To migrate to the daugther universe or just siphon energy from it and dump entropy in there.Accelerating the death of that universe and rejuvenating their own universe