Edit Shadow Key. A shadow key is an item found in gold chests in the dungeon. Shadow keys are required for unlocking a shadow chest. All shadow chests are originally found locked. Unlike a golden key, shadow keys are not consumed when unlocking a chest.
Muscle twitching, also known as muscle fasciculation, is marked by small muscle contractions in the body. Your muscles are composed of fibers, tissues, and nerves. When a nerve is stimulated or damaged, it may cause your muscle fibers to twitch. Many twitches experienced in your body are common and may go unnoticed.
Muscle Basics. Muscles are made up of three types of fibers: slow twitch (type I), fast twitch A (type IIa) and fast twitch B (type IIb). During exercise, your muscles are stimulated, and these tiny fibers contract. Slow-twitch muscle fibers contract at a rate of 10 to 30 twitches per second, while fast-twitch muscle fibers contract at a rate of 30 to 70 twitches per second, notes Peak Performance.