If you’re playing the Linked Game on your save file, you’ll enter a secret place called the Room of Rites. Once you reach Zelda, you’ll be warped to a mysterious room where you’ll battle against Twinrova. Koume will shoot fireballs while Kotake will shoot ice balls, so when they approach, swing the sword to knock it back at the one using the opposite element. After dealing several hits to the sisters, they will transform into one. In ice form, the floor will freeze, and the boss will release ice crystals that will break and bounce off the walls, moving around. In fire form, portions of the floor become lava pits, and the boss will throw fireballs. Swing the sword to attack, and when both elements show, use the Seed Shooter with Scent Seeds attached to continue the damage process. After dealing enough blows, Twinrova will sacrifice itself and resurrect Ganon. After defeating Twinrova, it will sacrifice itself to resurrect Ganon. Ganon will disappear for a short while and go to another spot. He attacks by swinging his trident, shooting fireballs, releasing fireballs from his trident that split and travel in different directions, hitting the turf to stun you, and throwing a big and fast fireball. If a dimensional field is formed, the controls will be reversed. After several blows, Ganon will finally be defeated. As you awaken Zelda, the Room of Rites will be destroyed, but a magical power will escort you back to the Maku Tree.
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https://www.youtube.com/watch?v=Ltxa2U7UAdo