When you are traveling through Helltide in Diablo 4, and trying to collect as many Aberrant Cinders as you can in order to open the chests so that you can get better gear from the Mystery chests you open, the event can get pretty intense. These Mystery Chests are not the same as the ones that you would open up during a Helltide event; instead, these chests are tucked away in specific locations across the map. This location is where all of the Helltide Mystery Chests that are hidden throughout the game can be found.

A location guide for all of the Helltide Mystery Chests in Diablo 4
There are a considerable number of Helltide Mystery Chests, and each and every region in Sanctuary is home to at least one of them. Because of the high cost of collecting them, you should stock up on Aberrant Cinders well in advance if you plan on amassing a large number of these items. Be aware that these chests will only show up on the map when you are in close proximity to them; therefore, you should not be surprised if they do not appear.

Mystery Chests for Diablo 4's Scoglen Dungeon
There are a total of eight Tortured Gifts of Mystery to be found, and your search should begin with Scosglen. They will require you to travel throughout Scosglen, so make sure you have all of the waypoints, as you will require them. They will require you to travel throughout Scosglen.

On the Abandoned Coast is where you'll find the first chest. It's on a small island that has a shipwreck on it. The west side of Northshore is where you'll find this deserted coast. It is recommended that you start your journey from Marowen if you are traveling from a waypoint.

In order to access the second chest, you will need to make your way into Fothrach Castle via the Cursed Scarps. Once there, you will find a chest hidden within the castle's ruins. From Marowen or Braestaig is the most convenient place to start your journey.

The third chest can be found in Stormbreak Cove, close to the dungeon known as Sunken Ruins. You can reach this location by traveling from the Braestaig waypoint.

The fourth treasure chest can be found to the south of Marowen, after traveling through the Scourging Ings and then entering Writhing Brook from the east.

You will find the fifth chest if you leave Tul Dulra and travel north into the Ancients' Woods until the chest appears on your minimap. This will allow you to access it.

You will want to make your way into the Kotama Grasslands from the primary waypoint in Scosglen by going around the path that is too narrow to pass through. In the vicinity of the Webbed Lode Cellar, there will be a sixth chest located in Vasily's Reach.

From the main bridge in Tul Dulra, go past the narrow path and make a slight right. This will bring you to an alcove where you'll find the seventh chest.

Traveling from Farobru, heading north, making a right turn, and then making another right turn when the path winds until it changes to Issalia's Rise is the most straightforward way to locate the eighth chest. It will be tucked away in a nook or cranny where you can find it.

Mystery Chests can be found in Diablo 4: Fractured Peaks.
You can find a pair of these chests in the Forsaken Quarry and a pair of these chests in the Black Asylum. The other pair of these chests can be found close to Mercy's Reach.

To begin, leave Menestad and travel in the direction of the dungeon located in Mercy's Reach. You will find a path to the left of where you are currently standing that you can take to get to the cellar of the Frosty Mine. You'll notice the chest appear just as you get closer to your destination.

Once more, leave Menestad and travel north until you come to a path on the left side of the road. Take the next right after that, and it should bring you to a chest once you've done that.

After leaving Kyovashad, take the east exit, and when you come out of the gate, turn left immediately. In that location, you will discover a Mystery Chest in addition to an Altar of Lilith.

When you leave Kyovashad via the east exit, turn right instead of leaving the city via the east exit and taking a left. The Immortal Emanation dungeon is located right next to this chest.

The Dry Steppes of Diablo 4 Those Strange Chests
The first chest is located at the terminus of the Helltide, in the area that is bordered by the Onyx Watchtower and the Hidden Overlook waypoints.
You will need to climb on top of a small bank that is located in the center of the Crucible of Cinder. You'll discover the second chest over there.
From Jirandai, travel in an easterly direction, and you'll find a chest near Alzuuda's field of Hatred.
Turn to the west and enter Jirandai to reach Desolation's Reach. Zarozar the Mighty might be heard wondering aloud why no one is willing to challenge him. If you are, then you can rest assured that you are in the right location.

Mystery Chests for Diablo 4 in the Kehjistan Region
In the entire region of Kehjistan, there are a total of seven chests, but at any given time, only three of them will be open and accessible to players.

You'll find the first chest if you make your way from the Altar of Ruin to the western coast's southwesternmost point.
It doesn't matter if you're starting from the Altar of Ruin or the Iron Wolves Encampment; you need to find the sliver of land where the Ragged Coastline and the Amber Sands meet. Following this path will bring you to a location known as the Dimmed Grotto, where you can locate a Mystery Chest.

Going south from the third chest will lead you to this chest, which is hidden away in an alcove.
When you leave the Altar of Ruin and head south, you should be able to find a chest perched on top of a hill. On the map, the hill won't be hard to locate at all.
Travel to Uldur's Cave, which is located roughly in the middle of the Ragged Coastline, and you will find another chest there.
Below Gea Kul, on the westernmost point of the shoreline, there is a chest that can be opened with a key.
When you leave Gea Kul, take the exit to the south, and then continue straight ahead. Once you have entered Hakan's Oasis, turn to your right. You can find yet another chest if you travel to the south of that area.

Hawezar, the Diablo 4 Mysterious Chests

Proceed in the direction of Margrave beginning in Wejinhani. To get around this, turn right just before you reach the Fractured Peaks. After passing the waypoint for the Margrave, you will find this chest close to the entrance to the Heathen's Keep dungeon.

When you are in Wejinhani, turn left and travel until you reach Pilgrim's Cave. Climb the wall to proceed further into the cave; the chest is located near the cellar of the Feeding Den.

There is going to be a bridge in the middle of the Fethis Wetlands, and you can get there either from Vyeresz or from Rakhat Keep. You'll find the chest on the side of the bridge that's on the Moors' side after you cross the bridge into the Moors.

After passing through Vyeresz, turn southwest into the Fethis Wetlands just before arriving at the Fields of Desperation. Look for a chest in the area surrounding a Lilith Altar and the Cellar of the Cursed Cabin.

Diablo 4's rewards for opening Mystery Chests
When you do find one of these particular chests, it will cost you 175 Aberrant Cinders to open it, and it has a chance to contain anywhere from two to five legendary items, or sacred or ancestral items depending on the world tier you are currently playing on. Although they are well worth the money, this does not guarantee that the items you purchase will be of any use to you once you have obtained them.

All of the Mystery Chests that can be discovered in Diablo 4 are listed here. There are a lot of them, but you should be aware that in regions where there are more than three of them, it is unlikely for there to be more than that number in that region at any given time.