Bringing the MC system to Middle-earth

In the year 1340 of the Shire calendar, there was still one year before the Lonely Mountain Expedition set out. At this time, the wizard had not yet visited the Shire, Thorin was still wandering, and the dragon was sleeping in the mountains...
This year, a human with the MC system came to Middle-earth.
So the high wall fortress was built overnight, and the golden wheat fields were endless.
The legend of the cube wizard spread in the wilderness.
Many years later, when the orc army was at the gates of the city, looking up at the infinite water pouring down from the sky, they were silent.
"Is this not playable?"
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This fanfiction is not mine, I got it from another website