the more sound is applied until it reaches its limit and explodes. It also has mutagenic properties, as it turned Klaw into a being of pure sound energy, and is mined from a large cave in a mountain near the Wakandan capital. Vibranium plays a central role in the Marvel Animation and BET Entertainment produced animated series Black Panther. In the live-action Marvel Cinematic Universe (MCU) series Agents of S.H.I.E.L.D. episodes "Love in the Time of Hydra", "One Door Closes", and "Afterlife", Bruce Banner built a cabin called the "Retreat" for S.H.I.E.L.D.'s use out of vibranium to temporarily house gifted individuals. Film Vibranium appears in the Marvel Animated Features series of films. In Ultimate Avengers: The Movie, the Chitauri use Vibranium in their spacecraft hulls and personal armor. S.H.I.E.L.D. later salvages one of their ships and use it as component of Captain America's shield as well as use it in other items such as bullets and knives. They also determined that only nuclear blasts and Vibranium itself is capable of penetrating Vibranium. The organization also developed the satellite Shield 1 to locate Vibranium anywhere on Earth and locate the Chitauri, though the aliens destroyed it. In Ultimate Avengers 2: Rise of the Panther, the Chitauri invade Wakanda for their subterranean supply of Vibranium. In this film, the element is portrayed as a substantial power source, as the Chitauri utilize condensed Vibranium cubes to power their spaceships. It is also the principal component of many Wakandan weapons and can be weakened by gamma radiation as well as gamma-powered individuals such as the Hulk. Vibranium (also known as Isipho) appears in live-action films set in the Marvel Cinematic Universe. First appearing and named on-screen in Captain America: The First Avenger, Howard Stark states the element is stronger than steel, weighs one third as much, and is completely vibration-absorbent. Having acquired enough to make a shield, Steve Rogers uses it when he becomes Captain America. In The Avengers, Captain America's shield proves strong enough to absorb and repel an attack from Thor's mystical hammer Mjölnir, and in Captain America: The Winter Soldier, it is also shown to be able to cushion falls from great heights. In Avengers: Age of Ultron, Ultron uses vibranium obtained from Ulysses Klaue for multiple purposes, including the creation of the synthezoid Vision. In Captain America: Civil War, Black Panther utilizes a suit composed of a Vibranium weave. In