Link must build a life from the ground up in order to gain the strength to defeat Ganon, in particular by conquering the four Divine Beasts that have been taken over by Ganon's malice.

Source: https://gamerant.com/best-games-like-cel-shaded-art/

This chest armor is one of three pieces that make up the Evil Spirit Armor Set, which is based on Phantom Ganon's appearance in The Legend of Zelda: Ocarina of Time.

Source: https://gamerant.com/legend-of-zelda-tears-of-the-kingdom-tloz-totk-how-to-complete-the-lomei-labyrinth-island-prophecy-walkthrough/