How To Get Shadow Mantle in Deltarune Chapter 3

Shadow Mantle is the secret boss that you must defeat to obtain a useful item in Deltarune Chapter 3. Here’s how to do it.

Shadow Mantle is the secret boss in Deltarune Chapter 3 (Image via Toby Fox)
Shadow Mantle is the secret boss in Deltarune Chapter 3 (Image via Toby Fox)

With Deltarune Chapters 3 and 4 finally released after much anticipation, players are already committed to uncovering the secrets and riddles hidden by Toby Fox. One of the biggest secrets in the new Chapter 3 of Deltarune is a hidden boss, The Shadow Mantle. While the final boss of Chapter 3 presents quite a challenge, you can make the battle easier by obtaining the Shadow Mantle item.

However, acquiring this item is quite difficult and can be easily overlooked before facing the boss. Here’s a guide to help you get the Shadow Mantle item in Deltarune Chapter 3.

Also Read: Deltarune: How To Find and Use Glowshard

Shadow Mantle in Deltarune Chapter 3

The Shadow Mantle serves both as an item and as the secret boss you encounter in Deltarune Chapter 3. To challenge it, you need to achieve an S rank in each of Tenna’s minigame rounds.

After completing each round, you can pass through the S Rank Door at the back of the room to play a minigame. Additionally, each time you enter the door, the challenge is different. However, during the third round, you will face the Shadow Mantle at the end of the minigame.

Tips on Defeating the Shadow Mantle in Deltarune

Dodge the bombs (Image via Toby Fox)
Dodge the bombs (Image via Toby Fox)
  • The boss is relatively challenging; take your time attacking it when it’s close and not actively attacking. 
  • Your best chance to strike is when the Shadow Mantle is lobbing bombs toward you. 
  • Shadow Mantle always respawns in the middle of the room after executing the tri-flame breath attack, so be ready to attack as soon as the assault ends. 
  • Ensure you eliminate all the minions that the boss spawns, as defeating them often drops health items, which are crucial during this fight.
  • The bombs release shockwaves in all cardinal directions: left, right, up, and down. Position yourself in the corners to evade damage. 

Once you defeat the boss, move to the upper part of the room and open the door to the television on the right side. You will obtain the Shadow Mantle item after opening the treasure chest. Make sure to equip it before challenging the final boss; otherwise, you risk being defeated in one or two hits.


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