I couldn't sleep.. so this happened, it's just stream of consciousness so it's unrefined and unedited, please don't comment on any writing errors.

Also my first written submission, hopefully I did it right.

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The man examined his prize, the one witholding it from him no more than dust in the wind.
It was oviod, no larger than an egg, gray and textured like a stone, and yet this was no ordinary rock, this was Wriflek, the wishstone.
He cradled it in his palm, the gray surface turning dark, fading into until staring at it was to look into the void, it pulsed and seethed with power as he fed his thoughts, his desires into this void.

And it responded.

The ground surged beneath his feet as he was caught by a platform attached to a spire rising from the earth, cracking and breaking stone as it rose up beneath him, carrying him further and further skyward.
The spire ceased its ascent thousands of feet into the air, and the man's breath came rapidly in the thin , cold air, but he held the stone aloft exultantly in his palm.

His bidding would be done.

The stone ruptured, no more than a small sliver at first, sliding down the middle of the void of its darkness.
The stone splintered, with a crackle a soft, dark substance began to bleed from its wound, rising and pouring into the air.

They would know his mercy.

Wriflek cracked open like a geode, the black poison bursting into the air, flooding into the clouds, veiling the afternoon sun in a thick, purple-hued haze.
The shadow flooded the sky, until it had soaked into the horizon, shrouding the land in a menacing twilight promising death.

He would free them.

The wishstone's tide began to ebb, what was a bright sunny day now was a looming darkness, some would last, but the night would be eternal, until all life had withered, until his kindness was paid out in full.