Somewhere in the corner of the universe

The dark and formless smoke starts to condense and swirl as if someone is mixing it in a cauldron. Eventually, it starts to have a colour to it. Pure black. After several more rounds of mixing, it starts to take shape, however, it is still in the gaseous form. It starts to shiftl left and right, as if it has a mind of its own. After Eons of mixing and forming, it transformed into a shadow, with an opaque black body in its gaseous form. 

Out of a sudden, it shot into the distance at an incredible speed, travelling passed several planets and galaxies in the blink of an eye. In an instant, right in front of him was another planet, however, it did not stop nor change direction, it just continued speeding towards the planet.

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Earth

Upon reaching the outermost surface of the planet, it continued its descend towards the planet, crashing through the celestial realm, followed by the immortal realm, and lastly, into the mortal realm. It crashed into a mountainous area and upon impact, a loud BANG could be heard throughout the whole continent as it devastated everything in its 10 miles radius.

As the smoke and dust from the crashed cleared, the shadow, twirled up in a ball of smoke and silently floated there.