You will stumble upon many secrets while exploring Atocpan in Genshin Impact, and one of them is what looks like a broken secret source dragon idol. Secrets will usually lead players into hidden areas where they will obtain precious or luxurious chests, as well as achievements in some cases.
A Lonely Sentinel achievement is not related to any quest in Genshin Impact, but you do have to complete a task while following the secret source dragon idol. Some parts will be tricky as travelers will navigate an underground cave filled with lava, so think wisely before making any move.
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How To Get A Lonely Sentinel Achievement In Genshin Impact
Just east of the Collective of Plenty clan location in Atocpan, there's a teleport waypoint near a dirt path. Travel to it and head east towards the pool of lava to see a secret source dragon idol lying still in the lava. There are a couple of Hilichurl around it protecting a remarkable chest. Upon approaching the dragon and shooting the barrel next to it, it will come to life and break through the nearby rocks to reveal a hidden entrance to a cave.
Follow it deep inside the cave until you eventually activate a teleport waypoint. As there is lava everywhere, and there is no way to proceed. At this time, the dragon idol approaches you with a common chest. Hop onto its body, and let it take you to the next safe spot. After dropping you off, the dragon will reappear with an exquisite chest but will stand far away from you.
To reach it, head south and climb the slope to get to the higher platform. Jump onto its body again to get the chest, and then jump to safety once the dragon retreats.
For the third time, the dragon will come near the same platform but with a mechanism. Climb the head-shaped statue and activate it to turn all the lava into solid rock. Use the nearby Tatankasaurus transformation and charge attack to destroy some of them and reveal a path down. Keep smashing the rocks until the serpent is visible. The secret source dragon idol will then unblock a path to the left and wait for you in front of the barrier.
Head to the newly opened path and touch the golden seal to remove the barrier and free the secret source servant imprisoned inside. You will get a luxurious chest as a reward. Take it and read the note next to the servant to proceed. Hop onto the dragon to be taken to the higher level of the cave, where players will get the A Lonely Sentinel achievement. Finally, use the newly spawned wind current to fly outside the cave and end the hidden quest.
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OpenCritic Reviews
- Top Critic Avg: 81 /100 Critics Rec: 87%
- Released
- September 28, 2020
- ESRB
- Teen / Alcohol Reference, Fantasy Violence, In-Game Purchases (Includes Random Items), Users Interact
- Developer(s)
- HoYoverse (Formerly miHoYo)
- Publisher(s)
- HoYoverse (Formerly miHoYo)






Step into Teyvat, a vast world teeming with life and flowing with elemental energy.
You and your sibling arrived here from another world. Separated by an unknown god, stripped of your powers, and cast into a deep slumber, you now awake to a world very different from when you first arrived.
Thus begins your journey across Teyvat to seek answers from The Seven — the gods of each element. Along the way, prepare to explore every inch of this wondrous world, join forces with a diverse range of characters, and unravel the countless mysteries that Teyvat holds...
MASSIVE OPEN WORLD
Climb any mountain, swim across any river, and glide over the world below, taking in the jaw-dropping scenery each step of the way. And if you stop to investigate a wandering Seelie or strange mechanism, who knows what you might discover?
ELEMENTAL COMBAT SYSTEM
Harness the seven elements to unleash elemental reactions. Anemo, Electro, Hydro, Pyro, Cryo, Dendro, and Geo interact in all sorts of ways, and Vision wielders have the power to turn this to their advantage.
Will you vaporize Hydro with Pyro, electro-charge it with Electro, or freeze it with Cryo? Your mastery of the elements will give you the upper hand in battle and exploration.
BEAUTIFUL VISUALS
Feast your eyes on the world around you, with a stunning art style, real-time rendering, and finely tuned character animations delivering you a truly immersive visual experience. Lighting and weather all change naturally over time, bringing every detail of this world to life.
SOOTHING SOUNDTRACK
Let the beautiful sounds of Teyvat draw you in as you explore the expansive world around you. Performed by the London Philharmonic Orchestra, the soundtrack changes seamlessly with the time and gameplay to match the mood.
BUILD YOUR DREAM TEAM
Team up with a diverse cast of characters in Teyvat, each with their own unique personalities, stories, and abilities. Discover your favorite party combinations and level up your characters to help you conquer even the most daunting of enemies and domains.
JOURNEY WITH FRIENDS
Team up with friends across various platforms to trigger more elemental action, tackle tricky boss fights, and conquer challenging domains together to reap rich rewards.
As you stand atop the peaks of Jueyun Karst and take in the rolling clouds and vast terrain stretching out before you, you may wish to stay in Teyvat a little longer... But until you are reunited with your lost sibling, how can you rest? Go forth, Traveler, and begin your adventure!
- Engine
- Unity
- Multiplayer
- Online Co-Op
- Platform(s)
- PlayStation 5, PlayStation 4, Xbox Series X, Xbox Series S, PC, iOS, Android
- Genre(s)
- RPG, Action, Adventure, Gacha, Open-World