Chilled Cape

"A long time ago, there was a small village in a desert. Desert beasts attacked the villagers day and night, threatening their lives. The people were protected by a mage, but the mage's power gradually weakened due to the heat of the desert. The village's engineers collaborated to develop a cloak that could keep the user's body temperature constant even under scorching heat. After donning the cloak, the mage regained his energy and succeeding in wiping out the beasts surrounding the village."