This Ninja Is Obviously Very Strong but Always Wants to Be Beaten

My name is Ghost Light Muyue, the successor of Mizukage in Kirigakure Village. Ding: "Young man, do you want to stop fighting for twenty years? From now on, you can become stronger by being beaten..." Ghost Lantern Twilight Moon: "I haven't been beaten in three days. It seems it's time to do something, otherwise there would be no reason to be beaten." "It's so hard for me..." (Welcome to the world of water shadows)