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.
Feels like a cell phone vibrating in my pocket. This is a question to discuss with your primary care doctor. There are a couple of different potential causes of this strange sensation you are having. The most likely possibility would be some spontaneous twitching in a muscle in the leg. This tends to occur when the muscle becomes fatigued, say after a vigorous workout. Most of the time, resting the muscle will allow the twitching to go away without the need for any further treatment.