"Breath of the World - SiIvaGunner: King for Another Day" is a high quality rip of "Breath of the World" from SilvaGunner: King for Another Day. It represents the King for Another Day Tournament contender Nintendo Power.
Joke
This is a The Legend of Zelda: Breath of the Wild-style arrangement of "Zelda's Lullaby" from the The Legend of Zelda series. At 0:10-0:21, samples from the Undertale easter egg track "abc_123_a" are heard. At 0:23 elements and vocals from "Weight of the World" from NieR: Automata are incorporated. At 1:10 "Fairy Fountain" from the The Legend of Zelda series is briefly quoted, at 1:58 "Overworld" from The Legend of Zelda is quoted, and at 2:47 "Overworld Adventure", also known as "Full Steam Ahead", from The Legend of Zelda: Spirit Tracks is quoted.