Welcome to this comprehensive How to Get Every Shadow Crystal in DELTARUNE where I’ll walk you through how to fight every secret “Shadow Crystal” boss hidden across Chapters 1 to 4. I’ll keep character fight details under wraps so you can experience those epic moments yourself! Ready? Let’s dive right in.
How to Get Every Shadow Crystal in DELTARUNE
Chapter 1 – The Beginning
This chapter sets up the foundation for your journey to find the Shadow Crystals. The secret bosses here require completing side quests before you can even challenge them. Don’t stress about it too early—most of it happens near the end of the Dark World inside King’s Castle.
Step 1: Reach the First Floor of King’s Castle
Once you gain access, head to the elevator on the right of the entrance. Click on the mysterious “??????” option, which will transport you into the dungeon beneath the castle.
Step 2: Talk to the Darkner
Inside the dungeon, find and talk to the Darkner behind the door. This unlocks a new dialogue option with Seam, the shopkeeper in the Fields of Hopes and Dreams.
Step 3: Get the First Key Piece
Warp back outside the castle to the Fields area. Speak to Seam and select the “Strange prisoner” dialogue. Seam will hand over the first piece of the key and drop a cryptic hint: “Walk where the stars don’t shine.”
Step 4: Find the Second Key Piece
This hint points to the Scarlet Forest, specifically the darkened path in the Scissor Dancer area. Follow the shadowy trail, and you’ll discover a chest containing the second key piece.
Step 5: Solve the Card Castle Puzzle for the Third Piece
Head northeast in the Fields, just before the Great Board. Here you’ll encounter a puzzle that requires entering a combination based on the suits of the Card Castle playing cards—from the lowest to the highest. The password to input is the sequence of suits (e.g., Clubs, Diamonds, Hearts, Spades).
Step 6: Repair and Use the Door Key
With all three pieces, visit Malius, the hammer Darkner at the Bake Sale, to repair them into a full Door Key. Return to the Card Castle dungeon and use this key to open the secret door.
Step 7: Fight the Secret Boss
You’ll now face the secret boss. Choose wisely whether to fight or spare them—each choice yields unique equipment rewards. Also, revisit Seam for special dialogue that adds rich lore about this mysterious character.
Chapter 2 – A Cyber’s World
The Cyber Field brings new challenges and puzzles as you track down another Shadow Crystal.
Step 1: Find the Hacker
After passing the bagel stand area, head south until you reach a place marked by a “Stupid” pop-up. This signals the right path where you’ll get your first checkmark.
Step 2: Collect Checkmarks at the Tea Cup Rides
Near the tea cup rides, jump on the middle one for your second checkmark. Then move to the left ride, solve the puzzle there, and get your third checkmark.
Step 3: Return to the Hacker
Bring all three checkmarks back to the Hacker. This completes the prerequisite for the next steps.
Step 4: Meet Spamton and Spare Him
Keep progressing through the Dark World until you reach Spamton. Make sure to spare him—damaging him too much will lock you out of the Shadow Crystal rewards.
Step 5: Get the KeyGen from Spamton’s Store
Once you reach Queen’s Mansion, find the Warp Door and return to the Trash Zone to enter Spamton’s store. Talk to him and purchase the KeyGen device. Prices fluctuate randomly, so freeze the price on something affordable.
Step 6: Use the KeyGen to Access the Basement
Back at Queen’s Mansion, locate the Hacker pacing in the room with cars. Watch closely to spot the switch he reveals to access the basement.
Step 7: Obtain EmptyDisk and LoadedDisk
Use the KeyGen to enter the basement and find the machine to get an EmptyDisk. Then return to Spamton’s store to trade for the LoadedDisk. Use it again in the basement.
Step 8: Fight the Secret Boss
Defeat this boss to earn rewards that vary depending on how you finish the fight. Enjoy the challenge!
Chapter 3 – Late Night
This is the longest and trickiest side quest, so buckle up.
Step 1: Obtain the ShadowMantle
To get the ShadowMantle needed to fight the boss, you must S-Rank both boards. If you fail, a Pippin in the Green Room can help by “making it so you did” get an S-Rank on the board you missed.
Pro Tips:
- Collect all four keys on Board 1.
- Eat the moss and reach the green spring on Board 2.
- Aim to hit the TP bonus after every encounter—it boosts points and rank.
- If stuck, use Susie to pull weeds for points; this resets on re-entry.
Step 2: Play Ramb’s Games Backstage
After S-Ranking the boards, head backstage (look for the door labeled “S”) and complete Ramb’s two games. These unlock further progress.
Step 3: Progress Through TV World and Backstage
After some exploration and looping through TV World, return to the Green Room, then backstage one last time.
Step 4: Get the Sword and Level Up
Equip the ShadowMantle and reach level 3 to break through barricades. From here, things get more linear and intense.
Step 5: Fight the Final Boss of the Chapter
This boss is tough—probably one of the hardest in a Toby Fox game. Bring extra ReviveMints and keep trying. The ShadowMantle is essential here.
Chapter 4 – Prophecy
Make sure you complete this before sealing the Dark Fountain!
Step 1: Find the Painting in the Old Man’s Study
In the study, interact with the painting titled “Legend of the Magic Ax.” This triggers the secret boss door puzzle.
Step 2: Play Notes on the Golden Piano
Locate the golden piano nearby where you found two halves of another piano. To unlock the door, you must play the correct notes.
Step 3: Collect the Sheet Music Pieces
- First Piece: Near the Bibliox spawn by the waterfall. Donate 100 Dark Dollars to reveal a secret path leading to the sheet.
- Second Piece: Back near the Old Man’s first meeting spot, climb the rocks right of the bookshelf that opened the study.
- Third Piece: Before the study, in the darkness ball area (left of the bookshelf), climb to the top left to find the last piece.
Step 4: Defeat the Secret Boss
Prepare for a challenging fight. If victorious, you’ll get Susie’s most powerful ax yet!
Enjoy hunting down every Shadow Crystal and uncovering the secrets hidden deep within the chapters! If you get stuck or want tips for specific fights, just ask.