Infiltration of Hyrule Castle

From Zelda Wiki.org

The Infiltration of Hyrule Castle is a stage in Four Swords Adventures within Near the Fields.

The four Links had to carefully sneak into Hyrule Castle, evading the spotlights covering the grounds lest they be spotted and thrown in a cell. The moat could be used as a helpful tool to avoid the spotlights by submerging and then swimming forward.

Then the four Links entered the castle's dungeon, only to find it swarming with Poes, including Jalhalla, the biggest Poe of all. They defeated the phantom fiend and rescued the White Shrine Maiden.

The music here is same music from the Dark World in A Link to the Past.