Keys & special Rare
Octarine Keyオクタリンの鍵
A clunky key cast in octarine. There should be a lock somewhere that it fits into.
In-game description
What is Octarine Key? Features and uses
Octarine Key is a rare item in Core Keeper (Keys & special). It is crafted at the Key Casting Table from Octarine Bar ×10. It can be obtained from Sea Biome Chest, Large Jellyfish (breakable object), Fishing in The Sunken Sea (non-fish catches) and 1 other sources.
Octarine Key key points (from the game data)
- Best source: Sea Biome Chest — 2.7% chance per roll.
- Sells to merchants for 114 Ancient Coins.
Calculated and summarized by this site from the game data (1.3.0.6).
How to craft Octarine Key (materials)
Crafted at
Key Casting Table What each crafting station makes →
| Material | Amount | How to get the material |
|---|---|---|
 Octarine Bar |
× 10 | CraftingChest |
What you get from salvaging Octarine Key (Salvage and Repair Station)
Octarine Key can be salvaged. Salvaging it gives the following items.
For each material, the amount is "amount used to craft × 0.49 (lower when durability is down, 0.3 at 0 durability) × the item's multiplier", and a fraction is the chance of one more (2.4 means 2, with a 40% chance of 3). The range is from 0 durability to full durability (items without durability always count as full). Scrap parts are a fixed number set by the item level. All items that can be salvaged are listed in salvaging.
How to get Octarine Key (Fishing, Enemy drop, Chests & pedestals, Breakable objects)
Fishing (1) Enemy drop (1) Chests & pedestals (1) Breakable objects (1)
| Source | Type | Biome | Amount | Chance |
|---|---|---|---|---|
| Fishing in The Sunken Sea (non-fish catches) | Fishing | The Sunken Sea | 1 | 2% |
| Blue Slime | Enemy drop | The Sunken Sea | 1 | 1.1% |
| Seashell Chest | Chests & pedestals | The Sunken Sea | 1 | 2.7% |
| Large Beached Jelly | Breakable objects | The Sunken Sea | 1 | 2.4% |
"Chance" is the chance to get at least one of this item per try (opening one chest, defeating one enemy, one catch). A "guaranteed group" is the group of a chest or boss from which exactly one item always drops; it does not mean this item always drops (the chance of it being picked from that group is shown in small text). Only items that always drop are marked "Guaranteed". Fishing means catches with a fishing rod, separate from enemy and boss drops. Calculated from the game's drop tables (Conf/Loot, 1.3.0.6) the same way the game rolls them.
Other ways to get Octarine Key
- Placed in or on the Seashell Chest found inside a scene (building, ruin, camp and so on) (guaranteed)Where: Sea Melody Room
- Placed in or on the Seashell Chest found inside a scene (building, ruin, camp and so on), 4 at a time (guaranteed)Where: Sea Harbor Town [The Sunken Sea] (1 per world)
- Can come from the Seashell Chest found inside a scene (building, ruin, camp and so on) (2.7% chance per container)Where: Fishing Deck [The Sunken Sea], Fishing Island [The Sunken Sea], Sea Camp Island, Sea Camp Island, Sea Camp Island, Sea Camp Island and 3 more
- Dig up the Digging Spot Sea found inside a scene (building, ruin, camp and so on) (guaranteed)Where: Cove Stash [The Sunken Sea], Sunken Sea Cove Puzzle [The Sunken Sea]
Scene containers, dungeon placements, guaranteed drops and natural spawns are based on the Obtaining data of the Core Keeper Wiki (Fandom) (CC BY-SA 3.0), because these are not in the game files this site reads. Scene names are the wiki's English names.