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The alarm echoed across the planet, a sign that the invasion had begun. From the depths of the ocean, an alien species similar to land crabs emerged, ready to conquer the Earth.
They were gigantic creatures, with a hard exoskeleton and sharp claws capable of tearing through steel. Their compound eyes scanned the environment, seeking prey and resources for their relentless advance.
The armies of the world mobilised, but their conventional weapons barely scratched the armour of the invaders. The aliens advanced unstoppably, crushing entire cities beneath their mighty paws.
In a desperate battle, scientists developed a weapon based on sonic waves, capable of weakening the alien crabs' exoskeleton. It was a fierce struggle, but in the end, the humans managed to repel the invasion.
However, the price was high. Vast tracts of land were laid waste, and the seas were polluted by the remains of the defeated creatures. The world had been brought to its knees by a species straight out of a nightmare.
As the survivors rebuilt their homes, a terrifying question haunted their minds: would the alien crabs return to attempt another invasion in the future? Humanity had won the battle, but the war for survival was just beginning.