7DS Origin | Act 3 - Descendants of the Dragon Walkthrough | The Seven Deadly Sins: Origin

Act 3 - Descendants of the Dragon Walkthrough

Last Updated: March 25, 2026 12:59 AM

Main Quest ACT 3 "Descendants of the Dragon" walkthrough for Seven Deadly Sins: Origin (7DSO). Learn about walkthrough steps and required gimmicks.

Early Game Guide	Daily Missions	Missable Content	Book of Stars
Gimmicks & Puzzles	Best Team Comps	How to Recover HP	Daily Missions
Character Upgrades	Weapon Upgrades	Enchant Guide	Boss Guides

7DSO Story Walkthroughs
Act 0 - 1	Act 2	Act 3
Act 4	Act 5	Act 6
Act 7	Act 8	Act 9
Act 10	Act 11	Act 12

Main Story Walkthrough Guide

Table of Contents

Enhance Heroes and Equipment
Act 3 Walkthrough
Act 3 Boss: Drake

Enhance Heroes and Equipment

Enemies Are Much Stronger

Starting from Act 3, regular enemies have noticeably higher stats, and you may find yourself getting KO'd unexpectedly. The Boss "Drake" also has a DPS check phase that requires high damage output to progress, so it's recommended to enhance your Heroes and Equipment before taking on Act 3.

Act 3 Walkthrough

Act 3-A Walkthrough Chart

Step	Objective
1	Head north to the settlement
2-4	Talk to Rose and defeat Caliste
5-8	Kill 10 MadFairies
9-11	Defeat "Frenzied Hawk"
12	Defeat "Frenzied Rose"
13-17	Collect "Problematic Flower" and show it to Gerharde
18-21	Collect ingredients for the medicine and give them to Gerharde
22	Treat fairies with the medicine
23-25	Find Rose based on the clues

Hawk Can Help Find the Problematic Flowers

"Problematic Flower" in Step 13-17 doesn't show any landmarks. Follow Hawk to collect the flowers else it will be difficult to find them since they blend in.

Act 3-B Walkthrough Chart

Part	How to Proceed
1	Talk to "Boot"
2-3	Follow the guide and talk to Mona
4-5	Defeat 5 Draco enemies and talk to the Villager
6-7	Follow the guide and defeat 5 enemies
8-9	Talk to Mannie and defeat 5 Draco enemies
10-14	Follow the guide and defeat 7 Draco Guards
15	Follow the guide, defeat nearby enemies, and free the prisoners
16-19	Talk to Kayla and defeat 8 Draco enemies in the Dragonblood Storage
20-22	Chase after Mannie and defeat 7 Draco enemies
23	Collect 4 fragments of the Altar key, "Dragon Egg"
24-26	Craft the Dragon Egg at a Workbench and place it on the Altar
27-31	Proceed deep into the Altar
32-35	Battle Drake Draco King Drake Guide
36	Destroy the Dragon Heart to defeat Drake, then talk to Boot

Collect Dragon Egg Fragments

Drake takes Mannie into the Altar and destroys the key. The Altar key "Dragon Egg" has shattered into 4 fragments scattered across the Dragon's Grave, so you'll need to collect all the fragments to restore the key.

How to Craft the Altar Key "Dragon Egg"

Full Walkthrough

Open the Workbench
Go to the Scroll Section of the Workbench
Place the crafted "Dragon Egg" on the Altar

Open the Workbench

The Dragon's Egg can be crafted at a Workbench. The initial "Makeshift Workbench" grade is sufficient.

Go to the Scroll Section of the Workbench

After opening the Workbench, you can craft the Dragon's Egg from the very bottom of the Blueprint section on the rightmost tab. It'll be instantly crafted so collect the Dragon Egg immediately.

Place the Crafted "Dragon Egg" on the Altar

Go near the pedestal and press the corresponding button to place the "Dragon Egg". This will unlock the Altar.

Act 3 Boss: Drake

Deplete About 25% HP

After depleting about 25% of Drake's HP, a gimmick phase begins where you must destroy the Elder Dragon Heart. You cannot progress without destroying the Dragon's Heart, so use all your Skills and unleash maximum damage output.