13 Destiny
Finally, with the last of our thirteen symbols, everything goes down a cosmic drain, seemingly into annihilation.
Scientists have detected the effects of these Black Holes in distant parts of our universe, where matter and even light are pulled in to collapse eventually to a theoretical singularity.

Atoms and perhaps even electrons cease to exist as they approach this point in time.
What they become is anyone's guess because we are back at the beginning, a single point.