Krobus is the lone friendly Shadow Monster in Stardew Valley, and he lives in the Sewers beneath Pelican Town. He runs a shop that stays open every day, can be befriended with gifts, and is the only non-marriage character who can move into your farmhouse as a roommate. Getting to him takes a few specific steps, none of which involve the Mines the way many players assume.
Quick answer: Donate 60 items to the Museum to receive the Rusty Key, unlock the Sewers, then raise Krobus to 10 hearts and give him a Void Ghost Pendant to make him your roommate.
Unlock the Sewers and find Krobus
Access to Krobus runs entirely through the Museum, not through reaching a certain Mines level. A common mistake is grinding to floor 120, expecting the key. The Rusty Key comes from museum donations, so this is the path that actually works.
Inside, Krobus stays put. He never leaves the Sewers and has no daily schedule to track, so he is always available whenever you drop in.
What Krobus sells every day
Krobus’s shop is open 24/7, every day of the week, which sets it apart from Pierre’s General Store and the Traveling Cart. Part of his stock is permanent, and some items appear only on specific days. Note that he stays silent on Fridays out of respect for his god, Yoba, but his shop still operates.
| Always-available item | Price | Supply |
|---|---|---|
| Return Sceptre (instant warp to farm, reusable) | 2,000,000g | One only |
| Stardrop (+34 max energy) | 20,000g | One only |
| Monster Fireplace | 20,000g | Unlimited |
| Void Egg | 5,000g | Unlimited |
| Wicked Statue Recipe | 1,000g | One only |
| Crystal Floor Recipe | 500g | One only |
| Sign of the Vessel | 350g | Unlimited |
| Void Essence | 100g | 10 per day |
| Solar Essence | 80g | 10 per day |
| Day | Rotating stock | Price |
|---|---|---|
| Monday | Slime | 100g |
| Tuesday | Omni Geode | 300g |
| Wednesday | Fish (Albacore, Sturgeon, Bullhead, Tiger Trout, Chub, Tilapia, Dorado, Shad, Lingcod, Halibut) | 200g |
| Thursday | Mixed Seeds | 30g |
| Friday | Iridium Sprinkler | 10,000g |
| Saturday | Cooked dishes | 50g–500g |
The Friday Iridium Sprinkler recipe is the standout. It waters 24 adjacent tiles once placed, which makes it a backbone for large, automated crop layouts. His steady supply of Void and Solar Essence also feeds high-end crafting such as Iridium Bands and Crystalariums, while the Void Egg can be incubated into a Void Chicken that lays more Void Eggs.
Best gifts to befriend Krobus
Gifting is the fastest way to raise his friendship hearts. A loved gift adds 80 friendship points, while a liked gift adds 45. His birthday is on the 1st of Winter, so a loved item on that day stacks an extra multiplier.
| Reaction | Gifts (beyond universal loves/likes) |
|---|---|
| Loves (+80) | Diamond, Void Egg, Void Mayonnaise, Wild Horseradish, Pumpkin, Iridium Bar |
| Likes (+45) | Quartz, Gold Bar |
Move Krobus in as a roommate
Krobus cannot be married, but he can live with you as a roommate once you reach maximum friendship. The item that invites him is not the Mermaid’s Pendant used for marriage.
As a housemate, he keeps his quiet routine, occasionally cooks meals such as Lucky Lunches or Fried Eel, and repairs broken fences overnight. The arrangement is fully platonic, which makes him a popular choice for players who want companionship without a romance storyline.
How to confirm each step worked
You’ll know the Museum milestone landed when Gunther appears outside your farmhouse the following morning and hands over the Rusty Key. The Sewers count as unlocked once the key disappears from your inventory after using it on the cover or grate, leaving the entrance permanently open.
If the forest cutscene won’t trigger, check the conditions. It only plays in Cindersap Forest between 9 a.m. and 4 p.m. on or after Spring 11, and you need the Rusty Key first. The roommate move-in is confirmed when Krobus accepts the Void Ghost Pendant and relocates to your home, after which he stops appearing only in the Sewers and begins his housemate routine.
