The LEGO Marvel Avengers Avengers Compound Battle set, item number 76131, is a building toy from the LEGO brand specifically themed around the Marvel Avengers universe. This set is part of the Avengers: Infinity War subtheme, allowing fans to recreate exciting battle scenes and imaginative adventures with their favorite Avenger characters. The set includes minifigures, vehicles, and accessories to enhance playtime and storytelling.