Octavo is the boss of Hyrule Castle.
The encounter is skipped if a player is Octavo.

Hyrule Castle has 4 floors which are done in succession without any checkpoint between them.

You can access Hyrule Castle early through Barrier Skip.

Lobby Brazier

The most common method of lighting the Brazier is to use an explosive.
You can use glove to throw a bomb, or place a chu to have it blow up next to the brazier.

You can also light the brazier with a torch, as long as you can reach it. (Hookshot, Cane, Hover Boots)
It can also be lit using fire items/spells.

Early Boss Key

Permadeath Freeze

This method is very limited in unseeded runs as it has to meet 2 criteria:

  • One of the two minibosses spawn by the chest.
  • You have to be able to freeze that enemy type.

The vast majority of seeds do not place an enemy by the chest, making this extremely unreliable unseeded.

Permadeath Feather

Exclusive to version 1.0.0 and 1.0.1.

The lobby did not have invisible fences around the walls until 1.0.2, making it possible to reach the boss key early.

Cane of Somaria

Pegasus Anklet

Co-op Zelda Switch & Cane

Exclusive to version 1.0.0 and 1.0.1.

Requires that you have 3 characters unlocked so that one player can swap away from Zelda to raise the trap wall.

Boss Key Skip

Co-op Hookshot Displacement

Exclusive to version 1.0.0 and 1.0.1.

Thanks to hookshot pivoting we’re able to hookshot past the boss door.

It is possible to do this without pivoting, but it requires additional items and setup.