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There was also a large underground lake inside, which was one of the things he had been trying to find, a water source. There was no way people could live without water, right? Even these red-skinned fire wielding people needed to satiate their thirst from time to time.
Surrounding the big underground lake there were over fifty large tents built out of animal pelt and large bones. And of course, they were not unoccupied, as there were over a hundred red-skinned people roaming all around the place. They were all similar to Nadia and Mina, red-skinned with black horns and fiery orange and red eyes, with silver hair, red hair, orange hair, and even black hair.
Check "The Protagnist's Sister Is Actually the Strongest"!