NPC Guide

Vog Location & Lost Fleas Guide

Find the hidden flea tracker merchant and unlock all Lost Flea locations in Pharloom

8 min read Putrified Ducts & Grand Gate Rosary Merchant
Merchant Flea Tracker Hidden NPC

What's in This Guide

TL;DR: Vog's in Putrified Ducts. Find her, she moves to Grand Gate. Pay 700 Rosaries total to reveal all unfound flea locations. Worth it if you're stuck at 25+ fleas.

Vog hidden merchant NPC character in Hollow Knight Silksong - flea tracker location guide

Who is Vog?

So you're stuck at 25 fleas and have no idea where the last five are hiding? Meet Vog—your grumpy but super helpful solution. She's a flea tracker who's camped out in the nastiest part of Putrified Ducts, way above the Bellway Station. Yeah, getting to her is a pain, but trust me, she's worth it.

Once you find her up there, she'll relocate to the Flea Caravan at Grand Gate where she sets up shop. Pay her some Rosaries, and she'll mark every single unfound flea on your map. All 30 of them if you want. It's basically a cheat code for completionists who don't want to spend another 10 hours pixel-hunting.

The Lost Fleas Quest (Context)

Before we dive into finding Vog, you should know why she exists. She's tied to the Lost Fleas quest—one of Silksong's biggest side quests where you hunt down 30 tiny fleas scattered across the entire map.

Quest Basics:

  • • Talk to Fleamaster Mooshka in The Marrow to start
  • • Find 30 Lost Fleas hidden all over Pharloom
  • • First goal: Find 5 fleas to get the caravan moving
  • • The caravan relocates as you find more fleas

Caravan Checkpoints:

  • 5 fleas: Caravan → Greymoor (you get Flea Brew)
  • 15 fleas: Caravan → Grand Gate (Vog shows up here!)
  • 25 fleas: Caravan → Putrified Ducts/Blue Lake
  • 30 fleas: Quest complete, final rewards

Why This Matters:

Some of these fleas are insanely well hidden. Like, "searched this room 5 times and still missed it" levels of hidden. Plus, certain areas lock you out after story events. That's where Vog comes in—she's basically your "I give up, just tell me where they are" option. And honestly? No shame in that.

Finding Vog's Initial Location

Vog's hiding in the upper part of Putrified Ducts—that gross area to the right of Memorium, above Bilewater. You'll need some specific abilities to even get there, so don't try this too early in your playthrough.

Requirements:

  • Faydown Cloak ability (essential for accessing Memorium)
  • Swift Step ability (recommended for easier navigation)
  • Putrified Ducts Map (helpful but not required)
Vog hidden merchant location in Silksong Putrified Ducts - where to find flea tracker NPC

Step-by-Step Path to Vog

Step 1: Reach Putrified Ducts

  1. 1. Navigate to the Choral Chambers
  2. 2. Use the Faydown Cloak to enter Memorium via the top-right corner
  3. 3. Travel through Memorium to access the Putrified Ducts

Step 2: Find the Hidden Passage

  1. 1. Locate the elevated platform in the Putrified Ducts
  2. 2. Look for a cracked wall section on the left side
  3. 3. Break through the wall to reveal a hidden path
  4. 4. Follow the path left and upward to a new screen

Step 3: Navigate the Spike Puzzle

Step-by-step path to Vog merchant in Putrified Ducts - navigate spikes and Barnaks to reach hidden NPC
  1. 1. Watch out for Barnaks hanging from the ceiling - they'll grab you with their tongues
  2. 2. Use Swift Step to dash over spike floors
  3. 3. Strategically allow Barnaks to lift you to higher spike-filled areas
  4. 4. Repeat the Barnak-lifting process until you reach the top
  5. 5. Head left once you reach the top to find Vog

Pro Tip: The key to this section is patience. Let the Barnaks help you - they're not just obstacles, but essential tools for reaching Vog's location.

What Does Vog Say?

Vog's not exactly the friendliest NPC you'll meet. She's grumpy, speaks in broken sentences, and calls you "bug" instead of your name. But hey, she's got the info you need.

When You First Meet Her (Putrified Ducts):

"Grrr.. bug, not flea. Why you must bother me? This spot is mine, fair fought and earned."
"Caravan? Grrr. Felt it in my fur... Time for change. If caravan is close, then my task, these lands, may near be complete. Now... Grrr. Much talk I gave. You leave me! Meet again at caravan, amongst good fellows. There I share my learnings of fleas and Pharloom. Till then, rest I need! Off, bug!"

Translation: "Get lost, but I'll see you at the caravan later."

At the Flea Caravan:

"Grrr....Bug not flea! Mine is to track, by trail and smell and senses sharp. Find our friend fleas, our young most of most, to bring them together and grow them strong."
"My learnings? Not free for you, but not flea. Rosaries! Give those and I shall say of what I have sensed. Work like mine... much long, and hard. For that, I deserve some riches held."

Translation: "I track fleas. Pay me Rosaries and I'll tell you where they are."

Who is She, Really?

Vog's whole life revolves around tracking fleas. She's spent who-knows-how-long studying their patterns, figuring out where they hide, and memorizing every nook and cranny of Pharloom. She acts all tough and annoyed when you show up, but she'll help you out... for the right price. Think of her as the grumpy expert who's seen it all and just wants to be left alone—except she also wants your money.

Vog's Merchant Services

After you meet her in Putrified Ducts, Vog packs up and moves to the Flea Caravan at Grand Gate. She'll be hanging out to the right of Fleamaster Mooshka. That's where she actually starts selling her services.

Vog merchant at Flea Caravan near Grand Gate in Silksong - where to buy flea location maps

How Vog's Service Works:

  • • Pay Vog in Rosaries to purchase area-specific flea location data
  • • Once purchased, all unfound fleas in that area will be marked on your map
  • • This service only reveals fleas you haven't found yet
  • • Different areas have different pricing based on the number of fleas they contain

Vog's Shop: Areas and Pricing

Vog sells flea location info for six different region packages. Buy a package, and she'll mark every flea you haven't found in those areas. Here's what it'll cost you:

Area Package Regions Covered Cost
Bonelands Wormways, The Marrow, Hunter's March, Deep Docks, Far Fields Rosaries 150
The Citadel The Citadel, Underworks Rosaries 150
Midlands Shellwood, Bellhart, Greymoor Rosaries 120
Bitelands Sinner's Road, Bilewater Rosaries 120
Blasted Steps Blasted Steps, Sands of Karak Rosaries 80
Mount Fay Mount Fay, The Slab Rosaries 80

Smart Purchasing Guide:

Total Investment: 700 Rosaries for all areas

Best Value: Mount Fay & Blasted Steps (80 each)

Most Expensive: Bonelands & Citadel (150 each)

Strategy: Buy areas you've fully explored first

Is Vog Actually Worth It?

Real talk: 700 Rosaries is a LOT. Let's break down whether you should actually spend your hard-earned currency on this service.

When It's Worth It:

  • • You're at 25+ fleas and have searched EVERYWHERE
  • • You don't want to spend hours backtracking
  • • You're going for 100% completion
  • • Some areas will become inaccessible later
  • • You value your time more than grinding Rosaries

When to Skip It:

  • • You're under 20 fleas found—too early
  • • You actually enjoy the exploration and hunt
  • • You need those Rosaries for other merchants
  • • You haven't explored much yet
  • • You're following an online guide anyway

My Recommendation:

Find at least 20 fleas on your own first. Then buy ONLY the packages for areas you've already thoroughly explored. For example, if you've been through Bonelands completely and only found 3 fleas there, buy that package. Don't waste money on areas you haven't visited yet.

Time vs Money: Each package saves you roughly 1-2 hours of searching. Is 150 Rosaries worth 2 hours of your life? That's the calculation you need to make.

Finding Fleas Yourself vs. Buying the Map

Method Pros Cons Time Investment
DIY Search • Free
• More satisfying
• Natural exploration
• Super time-consuming
• Easy to miss hidden ones
• Can be frustrating
15-20 hours
Vog's Service • Fast and efficient
• No guesswork
• Marks exact spots
• Costs 700 Rosaries
• Less satisfying
• Feels like cheating
2-3 hours total

Hybrid Approach (Best Option):

  1. 1. Explore naturally until you hit 20-22 fleas
  2. 2. Buy packages only for areas you've fully explored (you'll still miss some)
  3. 3. Keep the last few areas as a challenge for yourself
  4. 4. If you get stuck at 28-29 fleas, then buy the remaining packages

This way you get the satisfaction of finding most fleas yourself while avoiding the soul-crushing frustration of searching for that ONE last flea for 3 hours.

Strategy & Tips for Using Vog's Services

When to Visit Vog:

  • After finding 15+ fleas naturally - This ensures the Flea Caravan has moved to Grand Gate
  • When stuck at 25+ fleas - The remaining few are often very well hidden
  • Before starting late-game areas - Some regions become inaccessible after certain story events

Smart Spending Strategy:

  • Start with cheaper areas - Mount Fay and Blasted Steps offer the best value
  • Focus on areas you've thoroughly explored - No point buying maps for areas you haven't visited
  • Save expensive regions for last - Bonelands and Citadel packages are pricey but comprehensive

Rosary Farming Tips:

  • Buy the Rosary String from Pebb to keep Rosaries when you die
  • Clear enemy camps - Defeated enemies drop Rosaries
  • Explore thoroughly - Many hidden areas contain Rosary stashes
  • Complete side quests - NPCs often reward you with Rosaries

Common Questions About Vog

Do I need to find Vog before she appears at the Flea Caravan?

Yes! You MUST visit her in Putrified Ducts first. She won't just magically appear at the caravan. Make the trek up there once, talk to her, and then she'll move to Grand Gate where you can actually buy stuff from her.

What if I buy a package but still can't find the fleas?

The markers show up on your map, but they're not super precise—they show the general room/area, not the exact pixel. You still have to search that room carefully. Some fleas are behind breakable walls or in spots you'd never think to check. But at least you know which room to look in.

Can I get a refund if I already found all the fleas in an area?

Nope. Once you buy it, that's it. She only marks UNFOUND fleas, so if you've already found all of them in that area, you just wasted your Rosaries. That's why I recommend exploring first before buying.

How many Rosaries can I actually farm in the game?

More than enough. Rosaries respawn from certain sources and you can grind them from enemies. If you explore thoroughly and don't die constantly (losing Rosaries), 700 is doable. Buy the Rosary String from Pebb ASAP to keep your Rosaries when you die.

Does Vog show fleas in areas I haven't discovered yet?

Yes! But here's the thing—if you haven't explored an area, the markers won't help much because you don't even have the map unlocked. It's way smarter to explore first, buy the map from Horkin, THEN buy Vog's package for that area if you're missing fleas.

Is there a "best" order to buy the packages?

Start with the cheapest ones (Mount Fay and Blasted Steps at 80 each) IF you've already explored those areas. Otherwise, buy packages for areas you've spent the most time in. Bonelands and Citadel are expensive, so save those for last unless you're really stuck.

What happens if I miss Vog completely?

You'll have to find all 30 fleas the hard way. It's doable, but expect to spend a LOT more time searching. Some fleas are insanely well hidden—like, "who thought to look there?" levels of hidden. Vog is optional, but she makes life way easier.

Wrapping Up

Vog's one of those NPCs you might easily miss, but she can save you literally dozens of hours if you're going for that 100% completion. The trek to Putrified Ducts sucks, but it's a one-time thing. After that, she's just chilling at the Flea Caravan selling map data.

My advice? Don't rush to buy everything at once. Find 20+ fleas yourself first, then strategically buy packages for the areas where you're stuck. That way you get the satisfaction of hunting while avoiding the soul-crushing frustration of searching for that one last flea for three hours straight. 700 Rosaries sounds like a lot, but when you're at flea 28 of 30 and have no idea where the last two are, you'll understand why Vog exists.

Now go find that grumpy flea tracker and make your life easier!

Guide last updated September 2025