Skull Cavern

Warning: Spoilers   This page or section contains unmarked spoilers from update 1.6 of Stardew Valley. Players may want to avoid or be cautious toward reading this article/section.

Skull Cavern Entrance

For ladder/chute spawn rates, special monster drops, and the contents of crates and barrels, see The Mines.

The Skull Cavern is located in the northwest area of the Desert. It is initially locked and requires the Skull Key to gain access.

Monsters

Image	Monster	HP	Damage	Notes
	Armored Bug		8	Cannot be killed without bug killer enchantment.
	Big Slime	60	5	A chance to split into smaller Slimes when killed. Big Slimes are usually purple in the Skull Cavern.
	Purple Slime	410	28	Can drop Iridium Ore, Iridium Bars
	Lava Bat	80	15	Appears rarely; flies.
	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. Using a weapon with the Crusader enchantment stops them from reviving.
	Serpent	150	23	Moves quickly; default flying enemy.
	Iridium Bat	300	30	Appears at level 50+. Very high HP and Damage.
	Iridium Crab	240	15	Appears at level 26+.
	Carbon Ghost	190	25	May appear on Mummy levels. Frequently drop Omni Geodes.
	Pepper Rex	300	15	Appears mainly on prehistoric floors; breathes fire.
	Armored Bug (dangerous)	250	20-27	Only appears when the Skull Cavern is in a "dangerous" state.
	Mummy (dangerous)	445	38-55	Only appears when the Skull Cavern is in a "dangerous" state.
	Royal Serpent	675	28-41	Only appears when the Skull Cavern is in a "dangerous" state.
	Purple Slime (dangerous)	403	20-30	Only appears when the Skull Cavern is in a "dangerous" state.

Prehistoric Floors

A Prehistoric Floor

Prehistoric floors are a type of infested floor containing mainly Pepper Rex monsters. Mutant flies and Iridium Bats can also attack the player there. Dinosaur Eggs and Fiddlehead Ferns can be foraged on Prehistoric floors. Foliage on this floor has a chance to yield Ancient Seed when cut down. Below floor 6 there is a ~2.2% chance to encounter a prehistoric floor.

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 collapsible table of all possible treasures that can be randomly found inside Treasure Chests in the Skull Cavern.

Image	Name	Number in Chest	Chance
	Mega Bomb	5	1/25
	Bomb	10	1/25
	Cactus Seeds	15	1/25
	Life Elixir	2-4	1/25
	Omni Geode	5	1/25
	Warp Totem: Farm	5	1/25
	Rain Totem	1-3	1/25
	Apple Sapling	1	1/150
	Apricot Sapling	1	1/150
	Cherry Sapling	1	1/150
	Orange Sapling	1	1/150
	Peach Sapling	1	1/150
	Pomegranate Sapling	1	1/150
	Iridium Sprinkler	1-2	1/25
	Quality Sprinkler	4	1/25
	Parsnip Seeds	5-20	1/675
	Bean Starter	5-20	1/675
	Cauliflower Seeds	5-20	1/675
	Potato Seeds	5-20	1/675
	Garlic Seeds	5-20	1/675
	Kale Seeds	5-20	1/675
	Rhubarb Seeds	5-20	1/675
	Melon Seeds	5-20	1/675
	Tomato Seeds	5-20	1/675
	Blueberry Seeds	5-20	1/675
	Pepper Seeds	5-20	1/675
	Wheat Seeds	5-20	1/675
	Radish Seeds	5-20	1/675
	Red Cabbage Seeds	5-20	1/675
	Starfruit Seeds	5-20	1/675
	Corn Seeds	5-20	1/675
	Eggplant Seeds	5-20	1/675
	Artichoke Seeds	5-20	1/675
	Pumpkin Seeds	5-20	1/675
	Bok Choy Seeds	5-20	1/675
	Yam Seeds	5-20	1/675
	Cranberry Seeds	5-20	1/675
	Beet Seeds	5-20	1/675
	Spring Seeds	5-20	1/675
	Summer Seeds	5-20	1/675
	Fall Seeds	5-20	1/675
	Winter Seeds	5-20	1/675
	Cherry Bomb	15	1/25
	Red Slime Egg	1	1/25
	Purple Slime Egg	1	1/25
	Energy Tonic	2-4	1/25
	Iridium Bar	2-3	1/25
	Autumn's Bounty	5	1/250
	Pumpkin Soup	5	1/250
	Super Meal	5	1/250
	Cranberry Sauce	5	1/250
	Stuffing	5	1/250
	Farmer's Lunch	5	1/250
	Survival Burger	5	1/250
	Dish O' The Sea	5	1/250
	Miner's Treat	5	1/250
	Roots Platter	5	1/250
	Prismatic Shard	1	1/25
	Crystalarium	1	1/25
	Seed Maker	1	1/25
	Auto-Grabber	1	1/25
	Auto-Petter	1	1/25
	Blue Cowboy Hat	1	1/25
	Red Cowboy Hat	1	1/25
	White Turban	1	1/25

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 while using 10 or fewer Staircases or say the player is "clever" but not "honorable" for using more than 10. In either case, he will award the player with Iridium Snake Milk, which permanently increases the player's Health by 25 points.

Trivia

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

Bugs

File:BuggedTreasureFloor.png

An opened hidden chest

If a treasure floor spawns on a floor that is divisible by 20 but not by 40 (i.e. 20, 60 etc.), the chest will be spawned 4 tiles down, and be mostly hidden behind the wall.

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.
• 1.4: Added Pepper Rex. Added White Turban to possible Treasure Room items. All players entering a chute in Multiplayer now descend to the same level. Qi's challenge can now be completed during the first visit to the Skull Cavern. Chutes will no longer drop the player past level 100 if the Secret Note cutscene has not occurred.