Skull Cavern

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Skull Cavern Entrance
A shaft for faster descending

Skull Cavern is located in the northwest area of the Desert. It is initially locked and requires the Skull Key to gain access. After entering the Cavern for the first time, a letter is received on the following day, from Mr. Qi. The letter begins the quest Qi's Challenge, which is completed by reaching floor 25 in the Skull Cavern. Completing the quest awards Gold.png10,000g (Delivered by mail the following day).

There is no limit to the number of floors, or levels, in the Skull Cavern (at least until the integer limit of 2147483647 is reached). Similar to the Mines, the player advances through floors in the Skull Cavern by finding a ladder on each floor, either by mining rocks or defeating enemies. The player can sometimes find a shaft, or hole, which makes it possible to skip 3-15 floors. Jumping down the shaft causes health damage equal to 3x the number of levels skipped (although jumping down a shaft will never reduce health to less than 1). Unlike the Mines, there is no elevator to save progress, but on every floor there is a ladder at the starting point where you can leave the Skull Cavern. Each visit must start again from the first floor. If the player runs out of health or blacks out while exploring Skull Cavern, they will wake up sometime later on the same day, in Harvey's Clinic. A fee of Gold.png1,000g will be deducted for emergency surgery. Some items may also be lost.

Every ten floors the chance to find Iridium Ore increases significantly. The monsters in the Cavern also have a chance to drop ore and Iridium Bars. It can be a good idea to bring the Lava Katana or Galaxy Sword, as enemies are particularly strong. As with many other things, high Luck increases the frequency of ore veins, item drops, and the appearance of ladders/holes. Exploring the Cavern on a lucky day will increase the odds of finding loot and ladders. Since the frequency of Iridium Ore increases for every 10 floors descended into the Cavern, rapid descent is often more efficient for acquiring ore than thorough exploration. With a full bag of stone, it's possible to descend to floor 300+.

The plaques that can be occasionally found on the walls contain enciphered messages.

Preparation

Food

Useful food for exploring the Skull Cavern:

Image Name Ingredients Stat Bonus Duration
Autumn's Bounty.png
Autumn's Bounty Yam.png Yam (1)Pumpkin.png Pumpkin (1) Foraging.png Foraging (+2)Defense.png Defense (+2) Time Icon.png 7m41s
Coffee.png
Coffee Coffee Bean.png Coffee Bean (5) Speed.png Speed (+1) Time Icon.png 1m23s
Crab Cakes.png
Crab Cakes Crab.png Crab (1)Wheat Flour.png Wheat Flour (1)Egg.png Egg (1)Oil.png Oil (1) Speed.png Speed (+1)Defense.png Defense (+1) Time Icon.png 16m47s
Cranberry Sauce.png
Cranberry Sauce Cranberries.png Cranberries (1)Sugar.png Sugar (1) Mining.png Mining (+2) Time Icon.png 3m30s
Eggplant Parmesan.png
Eggplant Parmesan Eggplant.png Eggplant (1)Tomato.png Tomato (1) Mining.png Mining (+1)Defense.png Defense (+3) Time Icon.png 4m39s
Fried Eel.png
Fried Eel Eel.png Eel (1)Oil.png Oil (1) Luck.png Luck (+1) Time Icon.png 7m
Fried Mushroom.png
Fried Mushroom Common Mushroom.png Common Mushroom (1)Morel.png Morel (1)Oil.png Oil (1) Attack.png Attack (+2) Time Icon.png 7m
Lucky Lunch.png
Lucky Lunch Sea Cucumber.png Sea Cucumber (1)Tortilla.png Tortilla (1)Blue Jazz.png Blue Jazz (1) Luck.png Luck (+3) Time Icon.png 11m11s
Maple Bar.png
Maple Bar Maple Syrup.png Maple Syrup (1)Sugar.png Sugar (1)Wheat Flour.png Wheat Flour (1) Farming.png Farming (+1)Fishing.png Fishing (+1)Mining.png Mining (+1) Time Icon.png 16m47s
Miner's Treat.png
Miner's Treat Cave Carrot.png Cave Carrot (2)Sugar.png Sugar (1)Milk.png Milk (1) Mining.png Mining (+3)Magnetism.png Magnetism (+32) Time Icon.png 5m35s
Pepper Poppers.png
Pepper Poppers Hot Pepper.png Hot Pepper (1)Cheese.png Cheese (1) Speed.png Speed (+1)Farming.png Farming (+2) Time Icon.png 7m
Pumpkin Soup.png
Pumpkin Soup Pumpkin.png Pumpkin (1)Milk.png Milk (1) Luck.png Luck (+2)Defense.png Defense (+2) Time Icon.png 7m41s
Roots Platter.png
Roots Platter Cave Carrot.png Cave Carrot (1)Winter Root.png Winter Root (1) Attack.png Attack (+3) Time Icon.png 5m35s
Spicy Eel.png
Spicy Eel Eel.png Eel (1)Hot Pepper.png Hot Pepper (1) Luck.png Luck (+1)Speed.png Speed (+1) Time Icon.png 7m
Stuffing.png
Stuffing Bread.png Bread (1)Cranberries.png Cranberries (1)Hazelnut.png Hazelnut (1) Defense.png Defense (+2) Time Icon.png 5m35s
Super Meal.png
Super Meal Bok Choy.png Bok Choy (1)Cranberries.png Cranberries (1)Artichoke.png Artichoke (1) Speed.png Speed (+1)

Max Energy.png Max Energy (+40)

Time Icon.png 3m30s

Explosives

Bombs make quick work of densely-clustered stones and ore veins. They're also necessary for permanently defeating Mummies.

The Slingshot's Explosive Ammo is also effective in dealing with small groups of stones, Iridium Ore deposits, and incapacitated Mummies. Loading the Slingshot with Gold Ore deals substantial damage, making it potentially useful for dispatching tough targets. Explosive ammo can be crafted or bought at the Adventurer's Guild for Gold.png100g.

Staircase

  • Staircases can be used for rapid descent or skipping troublesome floors. Since staircases do not stack, it can be more space-efficient to bring plenty of Stone and craft the staircases as needed.

Rings

  • Several Rings may assist in exploring the Skull Cavern. See the Rings page for full descriptions.

Warp Totems

  • A Warp Totem can be used to make a quick exit if supplies are running low or the day is almost over.

Monsters

Image Monster HP Damage Notes
Armored Bug.png
Armored Bug 8 Cannot be killed.
Big Slime Sprite.png
Big Slime 60 5 Splits into smaller Slimes when killed. Big Slimes are always purple in the Skull Cavern.
Purple Slime.png
Purple Slime 410 28 Can drop Iridium Ore, Iridium Bar
Lava Bat.png
Lava Bat 80 15 Appears rarely; flies.
Mummy.png
Mummy 260 30 Needs to be finished with a bomb of any type after being knocked out with other weapons. If a bomb does enough damage to knock the Mummy out, it will also destroy it.
Serpent.png
Serpent 150 23 Moves quickly; default flying enemy.
Iridium Bat.png
Iridium Bat 300 30 Appears at level 50+. Very high HP and Damage.
Iridium Crab.png
Iridium Crab 240 15 Appears at level 26+.
Carbon Ghost.png
Carbon Ghost 190 25 May appear on Mummy levels.

Treasure Rooms

Small rooms containing treasure chests, similar to those in The Mines, can randomly appear at level 10+. Daily luck and Luck Buffs affect the chance to find Treasure Rooms. Obtaining the Special Charm also increases the chance to find Treasure Rooms.

Below is a collapsable table of all possible treasures that can be randomly found inside Treasure Chests in the Skull Cavern.

Image Name Number in Chest 
Mega Bomb.png
Mega Bomb 5
Bomb.png
Bomb 10
Cactus Seeds.png
Cactus Seeds 15
Life Elixir.png
Life Elixir 2-4
Omni Geode.png
Omni Geode 5
Warp Totem Farm.png
Warp Totem: Farm 5
Rain Totem.png
Rain Totem 1-3
Apple Sapling.png
Apple Sapling 1
Apricot Sapling.png
Apricot Sapling 1
Cherry Sapling.png
Cherry Sapling 1
Orange Sapling.png
Orange Sapling 1
Peach Sapling.png
Peach Sapling 1
Pomegranate Sapling.png
Pomegranate Sapling 1
Iridium Sprinkler.png
Iridium Sprinkler 1-2
Quality Sprinkler.png
Quality Sprinkler 4
Parsnip Seeds.png
Parsnip Seeds 5-20
Bean Starter.png
Bean Starter 5-20
Cauliflower Seeds.png
Cauliflower Seeds 5-20
Potato Seeds.png
Potato Seeds 5-20
Garlic Seeds.png
Garlic Seeds 5-20
Kale Seeds.png
Kale Seeds 5-20
Rhubarb Seeds.png
Rhubarb Seeds 5-20
Melon Seeds.png
Melon Seeds 5-20
Tomato Seeds.png
Tomato Seeds 5-20
Blueberry Seeds.png
Blueberry Seeds 5-20
Pepper Seeds.png
Pepper Seeds 5-20
Wheat Seeds.png
Wheat Seeds 5-20
Radish Seeds.png
Radish Seeds 5-20
Red Cabbage Seeds.png
Red Cabbage Seeds 5-20
Starfruit Seeds.png
Starfruit Seeds 5-20
Corn Seeds.png
Corn Seeds 5-20
Eggplant Seeds.png
Eggplant Seeds 5-20
Artichoke Seeds.png
Artichoke Seeds 5-20
Pumpkin Seeds.png
Pumpkin Seeds 5-20
Bok Choy Seeds.png
Bok Choy Seeds 5-20
Yam Seeds.png
Yam Seeds 5-20
Cranberry Seeds.png
Cranberry Seeds 5-20
Beet Seeds.png
Beet Seeds 5-20
Spring Seeds.png
Spring Seeds 5-20
Summer Seeds.png
Summer Seeds 5-20
Fall Seeds.png
Fall Seeds 5-20
Winter Seeds.png
Winter Seeds 5-20
Cherry Bomb.png
Cherry Bomb 15
Red Slime Egg.png
Red Slime Egg 1
Purple Slime Egg.png
Purple Slime Egg 1
Energy Tonic.png
Energy Tonic 2-4
Iridium Bar.png
Iridium Bar 2-3
Autumn's Bounty.png
Autumn's Bounty 5
Pumpkin Soup.png
Pumpkin Soup 5
Super Meal.png
Super Meal 5
Cranberry Sauce.png
Cranberry Sauce 5
Stuffing.png
Stuffing 5
Farmer's Lunch.png
Farmer's Lunch 5
Survival Burger.png
Survival Burger 5
Dish o' The Sea.png
Dish o' The Sea 5
Miner's Treat.png
Miner's Treat 5
Roots Platter.png
Roots Platter 5
Prismatic Shard.png
Prismatic Shard 1
Crystalarium.png
Crystalarium 1
Seed Maker.png
Seed Maker 1
Auto-Grabber.png
Auto-Grabber 1
Blue Cowboy Hat.png
Blue Cowboy Hat 1
Red Cowboy Hat.png
Red Cowboy Hat 1

Secret

After reading Secret Note #10, the player will find Mr. Qi at level 100 of the Skull Cavern. A cutscene ensues in which:

Details 
Mr. Qi will either congratulate the player for reaching level 100 without using Staircases or say the player is "clever" but not "honorable" for using them. In either case, he will award the player with Iridium Snake Milk, which permanently increases the player's Health by 25 points.

QiCutsceneSkullCavern.png

History

  • 1.3: Added Carbon Ghost, Iridium Bat, Iridium Crab, treasure rooms, and encounter with Mr. Qi. Removed exploit that allowed the player to avoid bomb damage by consuming food after placing a bomb.