Cave of Flames (S5) is the South fire-cave stage opened by the Green Music Box. Use the finder below for every Gray, Red, Green, and Blue chest plus all eight Musical Coins—with exact room-map links for Day/Night and each map variant. First priority is the Gray Chest Scepter, which reopens Sea Turtle Rocks, The Big Bridge, and The Frigid Sea on later layouts.
FIRST CLEAR PRIORITY
Open the Gray Chest for the Scepter, then revisit linked levels
Carry the Gray Key to the Gray Chest in the room family 0 / 11 / 14 / 21 / 24 / 27 / 28 and take the Scepter. It unlocks N6 Sea Turtle Rocks V2, S2 The Big Bridge V4, and E2 The Frigid Sea V3. Come back later for Minicar, Pouch, Scissors, and Musical Coins as High Jump Boots, Explosive Plunger Box, or Rust Spray open harder variants.
S5 CHECKLIST · CAVE OF FLAMES
Cave of Flames Finder
0 / 12 targets marked · browser checklist only
Map links open the Room & Target Index for this level. Match Day/Night and variant to your overworld state. Later variants can move some routes, but chest colors and treasure rewards stay the same. Progress is stored only in this browser.
ALL FOUR CHESTS · S5
Cave of Flames treasures by chest color
Each chest needs its matching key color in the same level. Colors are not unlocked globally—if you drop a key, go back and pick it up again. Room numbers below match the default Day layout; open the map link for live markers on your current Day/Night and variant.
| Chest | Treasure | Key rooms | Chest room | What it does | Map |
|---|---|---|---|---|---|
| Gray / Grey | Scepter |
0, 11, 14, 21, 24, 27, 28 | 0, 11, 14, 21, 24, 27, 28 | Unlocks Sea Turtle Rocks V2, The Big Bridge V4, and The Frigid Sea V3. | Open Gray Chest map |
| Red |  Minicar |
7, 20 | 7, 20 | Perfect-completion treasure. Key and chest share rooms 7 and 20 on the default Day layout. | Open Red Chest map |
| Green |  Pouch |
4, 9 | 26 | With Eye of the Storm (E1 Blue Chest), unlocks Out of the Woods V3. | Open Green Chest map |
| Blue |  Scissors |
6, 8, 13 | 6, 8, 13 | Unlocks Above the Clouds V3 for late South clean-up routes. | Open Blue Chest map |
MUSICAL COINS · MUSIC COINS
All 8 Musical Coins in Cave of Flames
Every level has eight Musical Coins. They are not required for the Perfect treasure screen, but finishing all 200 coins across the game unlocks Golf Building Course 4. Room numbers below match the default Day layout.
| Coin | Primary rooms | Also present in |
|---|---|---|
| Musical Coin 1 | 0 | 11, 14, 21, 24, 27, 28 |
| Musical Coin 2 | 2 | — |
| Musical Coin 3 | 4 | 9 |
| Musical Coin 4 | 6 | 8, 13 |
| Musical Coin 5 | 7 | 20 |
| Musical Coin 6 | 12 | — |
| Musical Coin 7 | 19 | — |
| Musical Coin 8 | 23 | — |
Open all Musical Coin markers on the Room & Target Index → · Full Musical Coins Finder for every level →
SOUTH FIRE ROUTE
How Cave of Flames fits the mid-game path
Unlock S5
Clear N6 Sea Turtle Rocks Gray Chest for the Green Music Box. Play it on the overworld to open Cave of Flames from The Big Bridge. The Green Music Box is also one of the five ending Music Boxes.
Scepter first
Take the Scepter so Sea Turtle Rocks V2, The Big Bridge V4, and The Frigid Sea V3 open. That loop is the main reason to enter S5 early after N6.
Pouch + Scissors + clean-up
Pouch pairs with Eye of the Storm for Out of the Woods V3. Scissors opens Above the Clouds V3. Finish Minicar and Musical Coins on High Jump Boots, Explosive Plunger Box, or Rust Spray revisits.
CAVE HAZARDS · NO NAMED BOSS
What to expect inside Cave of Flames
Flame blocks & heat
Expect flame blocks, torches, and hot corridors. Plan key carries around safe floors and short hops instead of long open dashes with a key in hand.
Bots and throw fodder
Hammer Bots, Spear Bots, and Para-Gooms appear across the cave. Use smash, grab, or form tools you already own instead of forcing every fight.
Transformation pressure
Mad Scienstein can force temporary forms. If a form blocks a key carry, leave the key, clear the room, then return.
MAP VARIANTS · DAY & NIGHT
When Cave of Flames layout changes
S5 has four progression variants on both Day and Night. Variant 1 is available once the Green Music Box opens the level. Later variants open after you collect specific treasures elsewhere:
| Variant | Requirements | Notes | Map |
|---|---|---|---|
| V1 | None (level open via Green Music Box) | Default first visit. Grab the Scepter and any open chest or coin routes here. | Open Day map |
| V2 | High Jump Boots (E4 The Colossal Hole Green Chest) | High-ledge layout after permanent High Jump unlocks. | Open Day map |
| V3 | Explosive Plunger Box (W5 Beneath the Waves Gray Chest) | Plunger-linked layout for mid/late fire-cave revisits. | Open Day map |
| V4 | Rust Spray (E3 Castle of Illusions Blue Chest) | Late-game layout for remaining 100% routes. | Open Day map |
FIRST VISIT ROUTE
What to do in Cave of Flames on the first clear
Enter from The Big Bridge
After the Green Music Box opens the cave, enter S5 from The Big Bridge. Lead Overalls, Swim Flippers, or High Jump help if you already have them, but none are required for the first Gray Chest push.
Gray Key → Scepter
Hunt the Gray Key in rooms 0, 11, 14, 21, 24, 27, or 28, carry it to the Gray Chest in the same family, leave with the Scepter, and unlock the three linked map variants on the overworld.
Optional clean-up, then revisit
If open, grab Scissors (rooms 6 / 8 / 13) and any easy Musical Coins. Leave Minicar, Pouch, and hard coins for High Jump Boots, Explosive Plunger Box, or Rust Spray revisits.
FAQ
Cave of Flames FAQ
How do you unlock Cave of Flames?
Collect the Green Music Box from the Gray Chest in N6 Sea Turtle Rocks, then play it on the overworld. The path opens S5 Cave of Flames from The Big Bridge.
How do I open the Gray / Grey Chest in Cave of Flames?
Find the matching Gray Key in the room family that includes rooms 0, 11, 14, 21, 24, 27, and 28, carry it to the Gray Chest in the same family, and open it for the Scepter.
What does the Scepter do?
It unlocks Variant 2 of Sea Turtle Rocks, Variant 4 of The Big Bridge, and Variant 3 of The Frigid Sea. Take it early so those levels gain new routes for chests and coins.
What does the Pouch do?
Together with Eye of the Storm from E1 The Stagnant Swamp (Blue Chest), it unlocks Variant 3 of N1 Out of the Woods for late North revisits.
What does the Scissors do?
It unlocks Variant 3 of S6 Above the Clouds. Grab it when the Blue Key and Blue Chest rooms 6, 8, and 13 are open on your current layout.
What does the Minicar do?
It is a Perfect-completion treasure from the Red Chest (rooms 7 and 20). It is not required for the five Music Box main ending.
How many Musical Coins are in Cave of Flames?
Eight—the same as every other level. Use the coin table above or the full Musical Coins Finder if you are missing one for 100% side goals.
Is Cave of Flames required for the ending?
No single S5 treasure is a Music Box. The level is still important because the Green Music Box that opens it is part of the five Music Box ending set, and the Scepter unlocks major revisit layouts for 100% progress.
Does Cave of Flames have a boss?
No. There is no named boss fight here. Focus on the four colored chests, eight Musical Coins, and map variants from High Jump Boots, Explosive Plunger Box, and Rust Spray.
Why does my Cave of Flames map look different?
Check Day or Night and the map variant. High Jump Boots opens V2, Explosive Plunger Box opens V3, and Rust Spray opens V4. Chest rewards stay the same; only room access and markers may shift.