Genshin Impact | Hidden Island In Natlan (Firethief's Secret Isle) Guide

Anemo
Anemo Traveler	Chasca
Jean	Kaedehara Kazuha
Mizuki	Varka
Venti	Wanderer
Xianyun	Xiao
Hydro
Childe	Columbina
Furina	Hydro Traveler
Ayato	Mona
Mualani	Neuvillette
Nilou	Kokomi
Sigewinne	Yelan
Geo
Albedo	Arataki Itto
Chiori	Geo Traveler
Linnea	Navia
Xilonen	Zhongli
Zibai
Electro
Clorinde	Cyno
Electro Traveler	Flins
Ineffa	Keqing
Raiden Shogun	Varesa
Yae Miko
Dendro
Alhaitham	Baizhu
Dendro Traveler	Emilie
Kinich	Lauma
Nahida	Nefer
Tighnari
Pyro
Arlecchino	Dehya
Diluc	Durin
Hu Tao	Klee
Lyney	Mavuika
Nicole	Pyro Traveler
Yoimiya
Cryo
Aloy	Citlali
Escoffier	Eula
Ganyu	Kamisato Ayaka
Lohen	Qiqi
Sandrone	Shenhe
Skirk	Wriothesley

Anemo
Ifa	Jahoda
Lan Yan	Lynette
Prune	Sayu
Shikanoin Heizou	Sucrose
Hydro
Aino	Barbara
Candace	Dahlia
Xingqiu
Geo
Gorou	Illuga
Kachina	Ningguang
Noelle	Yun Jin
Electro
Beidou	Dori
Fischl	Iansan
Kujou Sara	Kuki Shinobu
Lisa	Ororon
Razor	Sethos
Dendro
Collei	Kaveh
Kirara	Yaoyao
Pyro
Amber	Bennett
Chevreuse	Gaming
Thoma	Xiangling
Xinyan	Yanfei
Cryo
Charlotte	Chongyun
Diona	Freminet
Kaeya	Layla
Mika	Rosaria

Last Updated: August 20, 2026 1:39 PM

Hidden Island In Natlan Guide & How to unlock Firethief's Secret Isle. Learn how to unlock the hidden island and Firethief's Secret Isle puzzle guide.

Table of Contents

Location & How To Unlock?
Rewards

Firethief's Secret Isle Location & How To Unlock

Do 4 Challenges To Reveal The Island On Map

Firethief's Secret Isle is located southeast of Natlan Map. There is a waypoint on the waters. Heading there will take you to Firethief's Secret Isle. This will not reveal the island on the map however. To reveal the map, you need to do 4 challenges with Saurus.

▼ Step-By-Step Guide Per Challenge

If You Haven't Unlocked Waypoint, Use Ice Bridge Or Water Walking

Map	Location

If you haven't unlocked the waypoint, it is recommended to use characters that can walk on water or make an ice bridge.

Recommended Characters
Ayaka	Kaeya	Furina

Step By Step Guide Per Challenge

Challenge Sequence

Transform into a Yumkasaur and start challenge.

Close to the waypoint, there is a challenge that you can do. Start the challenge.

Head close to the void and stop it.

Clear everything to get a rune.

From area "2" and transform into Tepetlisaurus and start the challenge

Stop the voids while dodging their attacks.

You will see a crack by the mountain so dive inside it.

Stop the voids while dodging their attacks.

Above Water → Cave → Behind The Bush

At no. 4, start the challenge.

Defeat 2 waves of enemies.

Rewards At Firethief's Secret Isle

Area Will Be Revealed On Map

After clearing all the challenges, the hidden island will no longer be hidden from map.

Each Challenges Gives A Treasure Chest

You can get a treasure chest for every challenges that you did in the island.

Get Iridescent Inscription Fragment

Iridescent Inscription Fragment is a quest item that can be obtained by opening the Luxurious Chest at Firethief's Secret. This is unlocked by during the 4th challenge.

Iridescent Inscription Fragment - Uses & How To Get?

Natlan Related Articles

Natlan Guides
Natlan Guide
Map & Things To Do
Pyroculus		Shrine of Depths
Tona's Flame
Local Specialties
Saurian Claw Succulent	Sprayfeather Gill		Quenepa Berry
Brilliant Chrysanthemum	Glowing Hornshroom		Withering Purpurbloom
Skysplit Gembloom	Dracolite		-
Materials
Grainfruit	Candlecap Mushroom		Spinel Fruit
Embercore Flower	Cacahuatl		Red Berryshroom

Natlan Characters

Natlan 5 Star Characters
Chasca	Citlali	Kinich	Mavuika
Mualani	Varesa	Xilonen	-
Natlan 4 Star Characters
Iansan	Ifa	Kachina	Ororon
Other Natlan Characters
Xbalanque	-	-	-

Other Natlan Guides

Other Natlan Guides
Nightsoul Blessing			Craftable Weapons
Domains			Local Legends
Natlan Reputation System			Green-Edged Paper Slip
Talisman Of Waxaklahun Ubah Kan			Key To Somewhere
Red Metal Key			Shiny Shell
Courier's Trial Keystone			Shattered Night Jade
Yellow Obsidian Fragments			Iridescent Inscription Fragment
Strange Saurian Key			Nightsoul Trial
Warrior's Challenge			Ancient Chronicle Of The Dreamseeker Priest
Phlogiston Guide			Obsidian Ring

DPS				Support				Sustain
On-Field						Off-Field

Mondstadt	Liyue
Inazuma	Sumeru
Fontaine	Natlan
Nod-Krai	Snezhnaya

Alyosha	Danica
Mitya	Noy
Odette	Tsaritsa
Valeriy	Vesna
Vodyanitsa

Anemoculus			Shrine of Depths
Calla Lily			Cecilia
Dandelion Seed			Philanemo Mushroom
Small Lamp Grass			Valberry
Windwheel Aster			Wolfhook

Geoculus			Shrine of Depths
Cor Lapis			Glaze Lily
Jueyun Chili			Noctilucous Jade
Qingxin			Silk Flower
Starconch			Violetgrass