First envisioned as the cornerstone of a bold peacekeeping operation, the artificial intelligence known as Ultron took a massive leap forward, gaining sentience. Ultron's first twisted decision? Enact a massive plan to eradicate all life. This Avengers Age of Ultron Ultron Acrylic Key Chain features Ultron, a villainous robot and perhaps one of the greatest villains the Avengers will ever face. The Avengers Age of Ultron Ultron Acrylic Key Chain measures about 3 1/4-inches tall x 2 1/2-inches wide. Ages 8 and up.