Prologue

Solo Leveling x Danmachi
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The Shadow Sovereign had done it; he had spent 30 years within the gap between dimensions to ensure his world was at peace.
He was content, but couldn't help but feel something was off when he returned. He knew things would be different if he stuck around, the rulers even went so far as to send an emissary to inform him.
And so, heeding the rulers' advice, Sung Jin-Woo, he who resides over death, was transported to another world, one capable of withstanding his presence.
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Solo Leveling is such an amazing story, I highly recommend it.