Guren No Yumiya is the first opening theme for the anime Attack on Titan, performed by Linked Horizon and released in 2013 alongside the show's debut season. Its mix of rock, orchestral music and choral chanting became inseparable from the series' battles against the Titans. As the anime spread worldwide, short clips of the opening circulated on video platforms and soundboards, especially the opening surge. Fans still use it whenever a moment needs that same sense of defiance and scale.