The Deimpo Mausoleum is the third major area, and almost every player who gets stuck there is stuck on the same thing: the green door near Chef Gagi. It needs a lens, a gold mask, and the mask actually equipped. Get those three things right and the rest of the area opens up.

Getting in with the Cestus

You need the Cestus to enter the Mausoleum, and the entry is a specific movement sequence.

  1. Jump onto a corner.
  2. Use the Cestus and three dashes.
  3. Loot the mount at the top.
  4. Drop in.

The good news is that the Mausoleum has its own teleporter, so once you are in you do not have to worry about finding a way back. The Cestus itself never evolves but has an upgrade path, and its heavy attack is a mid-air uppercut that gives the height this entry needs — more on the technique in the movement tech guide.

The Chef, the teleport and the Knight Expedition Key

After you meet the chef, the route is short:

  1. Go left.
  2. Go up the stairs.
  3. Take the teleport and save — that is where the Knight Expedition Key comes from.

Saving here matters, because the rest of the area is the part of the game where a death costs you the most ground. The Green Seal Breaker is on the roof of the Mausoleum, not inside it, so climb up before you leave.

The order of the areas after this is in the where to go next guide.

Queen's Domain Deimpo Mausoleum: the green door and the six sigils

This is the gate most people lose an evening to.

  1. Get Puwema's lens, which is given by an NPC in the Mausoleum.
  2. Combine the lens with a gold mask to make a mask.
  3. Equip it. Players who found both pieces still stalled because they never equipped the mask.
  4. Once equipped, it shows a trail of green leaves when you are close to a sigil.
  5. Follow the trail to the six green sigils scattered through the lower caves and crypt area — not the big upper hall you came down through.
  6. A stone tablet near the end of the area tells you to find and dispel six sigils. The magic residue in the dark area is very easy to see once you have the mask on.

Only one lens is needed for this. With the six sigils dispelled, the boss door by the Chef opens, and players who fought that boss report it being unexpectedly easy.

The mask and lens combination is the same system that reveals hidden rooms elsewhere, so it is in the secrets guide as well.

The keys and the altar at the bottom

A few loose ends in this area are worth collecting on the way through:

  • The key that the dying knight with the crushed legs says he dropped is behind the pile of rocks that crushed him, at the end of the Mausoleum section.
  • The Stone Cube — the throwable the Wodaso pillar puzzle needs — is not inside the mausoleum at all. It is found by dropping off the side of the main island at the edge of the graveyard area where you got your first Wind Gem, facing the duck shop island, or below the cliffs near the crypt where you get the rusty greatsword.
  • The room with the many moving pillars holds two Wodaso sigils on tombstones: one near the two Manticore statues where you cross the room on the pillars while bats swoop down, and the other at the bottom of the main room in a small corner near one of the tunnel entrances. Interacting with both lights the torches.
  • The Altar of Purification, which upgrades the Holy Sword into the True Holy Sword Akunra, is deep in the lowest layer. Its door is in Verdant Woods and opens once you dispel the eight green sigils there with the Mask of Second Sight and Sipeha's Lens.

That last one is the reason this area matters for your loadout — the upgrade path is in the Holy Sword upgrade guide.