The short answer
- Silver skulls
- 69 Strange Silver Etched Skulls go to the door under the Petrified Garden. Every 10 you hand in pays out a reward: a duck at 10, then the Fossilized Fish at 20 and the Flying Mushroom Fossil at 30.
- Spirit Oil
- A consumable that levels up the weapon you have equipped. Use it on weapons you plan to evolve, not on the Trident.
- Weapon evolutions
- Most weapons evolve at level 10. Seven rusted weapons and the Wooden Club are the main line. Ossi’s lab in the Ancient World upgrades level 10 weapons further once you turn in data modules.
- Growth Apparatus
- An accessory that raises character XP by about 25%, measured by one player. It is reported in a castle room behind the Pentacles seal.
- Record of Sin
- It is an area, not an item. The Herald of Okbujo waits at its top floor and hands over the Memento Mirror after the fight.
- 69
- Silver skulls
- 30
- Skulls for flight
- Lv 10
- Usual evolution
- 10
- Data modules
- 33
- Accessories
- Nov 2026
- Checked on
The Necronomicon and the Record of Sin are not items at all
Queen’s Domain never explains most of its upgrade items, and two of the names people search for are not items. The Necronomicon is the Tower of Knowledge boss, covered in our Tower of Knowledge walkthrough. The Record of Sin is the library tower you drop into from the Ancient World. It holds the Herald of Okbujo, who gives you the Memento Mirror, and one complete 100% route places the visit after your first pass of Siraatsu Castle.
This page covers what the rest actually do: silver skulls and their rewards, Spirit Oil, how weapons evolve, and the Growth Apparatus. For the eight mementos and the ghosts you use the Mirror on, see our Storm Gem and statues guide. For how it all feeds the endings, see the endings guide.
The skull door pays out every 10 Silver Skulls, up to a final fossil
The door under the Petrified Garden takes Strange Silver Etched Skulls in any batch size. Players who handed in the full set agree on 69, and the game gives you no counter, so keep your own tally. Hand in what you have early: many high skulls need the reward at 30.
| Skulls handed in | Reward | What it does |
|---|---|---|
| 10 | Ancient Stone Duck Figurine | Take it to Umbada. Her stock then adds charms for each collectible type, including a skull charm. |
| 20 | Fossilized Fish | An accessory. Players report it raises several stats, but nobody has posted exact numbers. |
| 30 | Flying Mushroom Fossil | A short upward float. Many high skulls need it, though players report reaching a fair number with weapon jump tech. |
| 40 | Fossilized Anemone | Accessory. Effect not documented yet. |
| 50 | Sonic Crystal Fossil | Accessory. Effect not documented yet. |
| All 69 | The ritual, then the Pigeon Fossil | Rest and reload so the door opens. The Pigeon Fossil sits inside on top of a TV in the hallway leading to the ritual. One player reports it lets you teleport between save crystals. It is the last reward. |
The 10, 20 and 30 tiers have been confirmed by several players. The 40 and 50 tiers come from one complete Steam checklist, matching the every-10 pattern other players describe.
Two independent lists agree on 29 of the 69 skull spots
One full Steam checklist gives all 69 pickups in order, and one English screenshot list gives about 60. We matched them against each other and kept only the spots where both, or another player, independently describe the same place. Region totals in the middle column are from the full checklist. Some skulls also need the ten-dash reforged sword or the Flying Mushroom Fossil, marked below; our weapons guide covers the Akunra reforge.
| Area | Total | Spots two sources agree on |
|---|---|---|
| Isle of Neasied | 4 | On Chef Gagi’s chimney on the remote island past the golem cliffs (all five Wind Gems), on top of the Endu Shrine (you see it from inside the Shrine Guardian arena, not from the beach), in the broken gap near the top of the spire beside the Neasied wing altar (Flying Mushroom Fossil). |
| Obmuer Temple | 5 | Hidden under the elevator after Dagoom. High in the far right of the room with the three Royal Guards, across the gap (four or more Wind Gems). |
| Tower of Knowledge | 5 | On top of the spire above the Tower doorway that leads to the Mausoleum bridge (ten dashes from Akunra). |
| Deimpo Mausoleum | 10 | On the shelf left of Gagi’s stove. In the center coffin after Poenir and Duenir. In a sarcophagus behind the secret wall by the bat gem statue. Between the jars behind the double secret wall on the staircase where the first spider appears. Behind the altar where the mementos go. On a high ledge across the red-water Wind Gem room (Akunra dashes). On top of the spire in the middle of the bridge outside. |
| Ancient World | 15 | Behind a secret wall halfway down the second big vent shaft. In the small room above the dead end in the first vent’s left branch (flight). Drop into the giant hollow tree by the wing altar (flight). In the hole above and right of the fifth Wind Gem. On the far platform just before the drop into the Record of Sin. |
| Siraatsu Castle | 6 | On top of the iron drum in the corner of the storage room behind the bar. High up in the main hall (flight). Two on the castle roof, reached through a window with no glass. |
| Verdant Hollow | 7 | On the roof of the temple where Endu becomes Akunra. On a branch beside the hanging building, reached through the hidden wall on the Mausoleum spiral stairs. |
| Forgotten Dungeon | 2 | Near the ceiling of the round room with three green torches at the bottom of the elevator from the Tower of Knowledge, above the Sipeha statue (flight). |
| Rotting Cavern | 5 | Three high up near the double gates toward Petrified Garden and Verdant Hollow: on the arch, on a boulder by the first save point, and on the building next door (flight). |
| Record of Sin | 3 | On the vines above the Herald of Okbujo’s arena. |
| Underground levels | 4 | Not cross-checked yet. |
| Petrified Garden | 2 | Not cross-checked yet. |
| Umbada’s island | 1 | Not cross-checked yet. |
Umbada sells the skull charm once you bring her the Ancient Stone Duck, and players say it marks skulls at a distance. Even with it, players warn some skulls hide far outside detection range. One player’s last skull was on the roof of the Endu Shrine, which you can walk past for the whole game.
Spirit Oil levels whichever weapon you have equipped
Spirit Oil is a consumable that adds weapon experience to the weapon you are holding. One player compares it to a rare candy for weapons. Another used three bottles to take a weapon to level 8 before finishing by hand, which works out to a couple of levels per bottle.
Use it on weapons you intend to evolve, since most evolve at level 10. Do not use it on the Trident unless you want the Ruby key early: a single bottle breaks it on the spot. Bottles also turn up in odd corners, such as an alcove in the shaft of the Obmuer Temple boss room (Flying Mushroom Fossil needed) and a hidden room in the Shock Rifle dungeon in the Ancient World. One player prices it at 15 Ancient Coins in Umbada’s late stock; we could not confirm the price against a second source.
Eight base weapons evolve at level 10, and Ossi’s lab upgrades them again
Most weapons have a level 10 cap with a 3% damage bonus per level, covered in our weapons guide. The rusted weapons and the Wooden Club are the actual evolution line: at level 10 each becomes a named god weapon, and Umbada starts selling a plain copy of the old one.
| Base weapon | Evolves into | Copy Umbada adds |
|---|---|---|
| Rusted Short Sword | Sipeha’s Twisted Heart | Ancient Short Sword |
| Rusted Spear | Jigeki’s Serpent Thrust | Common Spear |
| Wooden Club | Puwema’s Blessed Orb | Hard Wooden Club |
| Rusted Greatsword | Wodaso’s Holy Lightning | Scaled Greatsword |
| Rusted Great Morning Star | Jigeki’s Rot | Bronze Great Morning Star |
| Rusted Leaf Blade | Puwema’s Wind Dancer | Gilded Leaf Blade (plus Ring of Wind) |
| Rusted Longhammer | Sipeha’s Void Maul | Silver Longhammer |
| Rusted Greataxe | Okbujo’s Silver Garden | Black Steel Greataxe |
The Rusted Longhammer sits in a secret below the Neasied cemetery. The Rusted Greataxe is behind the hidden wall on the long spiral staircase in Deimpo Mausoleum near Chef Gagi, which leads out to a hanging building in Verdant Hollow. The vault weapons and their key stones are in our weapons guide.
Two evolutions are odd ones. The Strange Stone Block throwable can become Wodaso’s Power Cube: equip it and Wodaso’s Lens, throw it at three targets marked by purple light near the diamond-shaped door, beat the mechanical gargoyle that comes out, and take the upgrade downstairs. The Reinforced Jar Club breaks at level 5 into the Symbol of Jigeki, a treasure, much as the Trident breaks into a key.
Past level 10 there is one more step. Ten data modules sit behind orange symbols around the island, which open with the Orange Ochre Seal Breaker Ossi gives you. Hand the modules to Mechanical Engineer Ossi in the Ancient World. Each fills a slot in the powered suit in his lab; the suit has 12 slots and two start filled. Weapons have to be level 10 before they even appear in the upgrade list. One player matches the Mundane Data Module to the shop copies of the rusted weapons and the Holy Data Module to seven of the god weapons above. Upgrading every main weapon pops Perfected Weaponry, and handing in all ten sets up the Strange Explorer fight. Nobody has posted exactly what each lab upgrade changes, so we are not stating numbers.
The Growth Apparatus adds about 25% character XP
The Growth Apparatus is one of the 33 accessories. One player tested it directly: an Augur Impaler is worth 625 XP in the Bestiary and paid 781 XP with the Growth Apparatus equipped, about a 25% gain. A second player pairs it with the Training Band when levelling, using the Training Band for weapons and the Growth Apparatus for your character.
On location, one complete Steam checklist puts it in a chest inside a sealed room off the green-carpet corridor on the second floor of Siraatsu Castle, the room that opens with the Seal Breaker of Pentacles. We could not confirm that room against a second source or footage, so treat it as reported.
Three upgrades decide which of the four endings you can reach
| Ending | Upgrade it needs |
|---|---|
| Ending 2 | True Holy Sword Akunra, reforged from a max level Endu at the Temple of Puwema |
| Ending 3 | Memento Mirror from the Record of Sin, eight mementos, Okbujo’s Judgement |
| Ending 4 | All 69 skulls and the ritual at the skull door, on top of Ending 3 |
The practical order: level Endu to full, get Akunra for the ten dashes, hand in skulls in batches of 10 so you have flight by 30, and then sweep the remaining high spots. Exact ending steps are in our endings guide.
FAQ
How many Silver Skulls are in Queen’s Domain?
69, and you need all of them for Ending 4. There is no in-game counter, so keep your own tally.
When do you get the Fossilized Fish?
After handing 20 skulls to the door under the Petrified Garden. The Flying Mushroom Fossil comes at 30.
What does Spirit Oil do?
It adds experience to the weapon you have equipped. Save it for weapons you plan to evolve at level 10.
What does the Growth Apparatus do?
One player measured about 25% more character XP while wearing it.
Is the Record of Sin an item?
No, it is an area reached from the Ancient World. The Herald of Okbujo at the top gives you the Memento Mirror.
Why don’t data modules upgrade my weapon?
Weapons only appear in Ossi’s upgrade list once they reach level 10, and players report each module covers only some weapon families.
Checklist
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Source & credit
Queen’s Domain is developed by Freshly Baked Games and published by Future Friends Games. Item effects and locations come from the game’s Steam community guides and discussions, including Sdaknight’s 100% checklist, Zer0’s silver skull screenshot list, Digitol’s 100% walkthrough, Arceil’s treasure room guide, and the players who tested Growth Apparatus and traded data module findings. Hero images are from the official launch trailer. Checked against patch 1.01.05.
