My Kidneys Are Getting Stronger Again!

A young man traveled through a fantasy world and became the Second Highness of the Central Plains Kingdom. However, at the beginning, he was besieged by the enemy's massive array and a million-strong army! "Don't panic!" The young man closed his eyes calmly, "Wait for my highness to make the first charge!" "Ding, the recharge was successful, it consumes -99999 kidney function points." "Ding, get the artifact: Jade Seal of Destiny*1!" I felt a sharp pain in my lower abdomen, my body was hollowed out, and I almost fell to my knees! Then, he saw the holy light shining in mid-air above the young man's head, and a huge brick smashed down, crushing a million enemy soldiers into pulp! "Get kidney stones +1!" "Get kidney stones +2!" "Get kidney stones +3!" My kidneys are hardened, but also stronger! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.