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★ Tasks & Wishes: Berry Picking | The Lost Fleas

There are 4 Simple Keys in Hollow Knight: Silksong that you can use to unlock different doors and cages. See where to use Simple Keys and the locations for all 4 Simple Keys in this guide!
List of Contents
| Simple Key Door Locations | |
|---|---|
| Moss Grotto | Deep Docks |
| Sinner's Road | High Halls |
| Locked Old Door Guide |
|---|
|
1.Go to the Left of Mosshome 2. Use the Hanging Cages to Reach the Other Side 3. Go Past the Acid-Spitting Bug 4. Use the Key on the Locked Door |

Go through Mosshome and drop down to the opening on the floor to the left-most part of the area. Then, head left to the next room.
Keep heading left to find hanging metal cages that you can step on. Use Swift Step to reach them and get to the other side.
Enter the area to find a Craggler, large bug that spits out acid. Avoid attacking it for now and instead hide underneath the platforms. Use Swift Step and keep heading left until you reach the next room.

Once you get to the Locked Old Door, you can use the Simple Key to unlock a new major area called Wormways. Do note that you can only use a Simple Key once, as it will be consumed afterwards.
Pharloom Full Map and All Locations
| Overworld View | Map Location |
|---|---|
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There is a locked door in Deep Docks that requires a Simple Key. Using this item will unlock a large area part of Deep Docks that you can explore. Do note that using the Simple Key will consume it, so you can only use it once.
You can access the location as it is connected to a hidden area in Far Fields. We recommend using the Simple Key in the door above Bone Bottom instead, then open this door once you get another Simple Key.

You can use a Simple Key to free the Green Prince in Sinner's Road. Use the one dropped by the enemy in the same area.

The final door where you can use a Simple Key can be found in the High Halls, just west from the bench. It will lead to the Rosary Storage, which is where you can get the Rosary Cannon.
| Simple Key Locations | |
|---|---|
| Moss Grotto | Sinner's Road |
| Sands of Karak | Choral Chambers |

A Simple Key can be purchased from Pebb's Shop in Bone Bottom. This will cost you 500 Rosaries, so we suggest farming them to get it. Do note that you can only purchase it once.

An enemy at the top of Sinner's Road drops a Simple Key once you defeat it. Be wary while exploring the area, as you will have to avoid spikes and stick to walls to get to the area.

A sitting corpse on a bench in Sands of Karak has a Simple Key that players can get. There's no other specific requirements to get the key, so make sure to grab it while you're nearby.

The final Simple Key can be purchased from Jubilana in Songclave, which is at the top right area of the Choral Chambers. This costs 650 Rosaries, and it can only be obtained after Wandering Merchants has been completed.

| Memory Locket | Simple Key |
| Crafting Kit | Bone Scroll |
| Tool Pouch | Craftmetal |
| Shard Bundle | Key of Apostate |
| Key of Indolent | Key of Heretic |
| Cogheart | Craw Summons |
| Psalm Cylinder | Twisted Bud |
| Mossberry Stew |
All Simple Key Locations and Where to Use

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I found another Simple Key in possession of Jubilana. Spoilers. In the Capital, once you activate the First Shrine bell, it activates a settlement to soon appear, along with a wish board with a wish for locating the traveling merchant Jubilana, and once you save her, she sells a Tool "Ascendant's Grip" which allows you to cling to walls, possibly indefinitely, a Mask Shard, a Simple Key, and a Spool Extender.