Complex sentence: Luffy is able to use the elasticity of his body to concentrate his strength and power to execute a diverse range of attacks, the most prominent being his signature "Gum-Gum Pistol", in which Luffy slingshots his punches at opponents from a distance.
Split into simpler sentences: Luffy is able to use the elasticity of his body to concentrate his strength and power to execute a diverse range of attacks. The most prominent is his signature attack called Gum-Gum Pistol, in which Luffy slingshots his punches at opponents from a distance.