You have the ability to raise the overall level of your maps in the Atlas by collecting Voidstones. Path of Exile features a total of four unique Voidstones, each of which can be acquired by defeating a specific type of boss.

You'll find a place on your atlas that has four empty sockets if you look in the very bottom center of the book. If you haven't been able to find any pedestals just yet, this is because you need to first unlock them. You won't be able to use the sockets until you have at least one voidstone in your inventory. As soon as you obtain these sockets, you are able to immediately place any of the four different voidstones into them. Path of Exile features four unique types of voidstones, which are as follows:

The Seer will occasionally drop a ceremonial Voidstone.
Voidstone that has seen better days, dropped by the Uber Elder.
The Eater of Worlds will occasionally drop an omniscient Voidstone.
The Searing Exarch will occasionally drop this Grasping Voidstone.
You are able to increase the level of each of your maps by up to four with the use of voidstones. If you have one voidstone socketed, all of the maps have a level of four. If you have two voidstones socketed, all of the maps have a level of eight.

Path of Exile: Strategies for Confronting the Bosses
First of all, a word of caution. Because the game's most powerful bosses are responsible for dropping them, players won't have access to voidstones until late in the game's endgame.

Consumer of Worlds and Exarch of the Searing Flame
If you push your Atlas far enough, you will "automatically" obtain the first two Voidstones, which are required for defeating the Searing Exarch and the Eater of Worlds, respectively.

When you play enough maps at level three, Envoy will eventually show up on one of the maps. The moment it appears, your mapping device will immediately begin to unlock new symbols. You will receive an icon for the Maven during the first encounter, and then during the next two encounters, you will receive icons for the Exarch and the Eater of Worlds, respectively. After inserting a map into your device, activating one of these three symbols, and then opening the map, you will play the map while under the control of the respective boss.

You simply have to complete maps while these bosses have their influence active in order to unlock access to the Exarch and the Eater of Worlds. In order to accomplish this, the game will require you to successfully complete increasingly difficult levels of maps. You have to prevail over a number of minibosses, such as the "Infinite Hunger," before you can proceed to face the two main bosses at the end of the game. In addition, the same three symbols that are displayed in your map device are shown in the atlas directly above the sockets where the voidstones can be placed. There, you will be able to view the number of additional maps that must be completed before you will be invited to face the boss.

At the conclusion of each map, if you have made sufficient progress, you will receive an invitation to speak with the Exarch and the Eater of Worlds. If you are successful in defeating them, you will be awarded the appropriate voidstone.

The Wise Counselor and Elder Uber
It is even more difficult to acquire the other two voidstones due to the fact that the battles against the Maven and Uber Elder are the most challenging encounters in the game.

Instructions on How to Reach the Maven
You must first run through maps while under the influence of the Maven and defeat the map boss in order to unlock the Exarch or Eater of Worlds achievement. The Maven will "collect" this boss in order to advance the story. Following the completion of three bosses in this manner, you will be granted a Maven Invitation, during which you will take on all three bosses simultaneously. After you have accomplished that, it will continue in the same manner, but there will now be four map bosses, then five, and so on, until finally, you will be fighting ten bosses at the same time.

There are additional Maven Invitations available, some of which are even more challenging than these Atlas Invitations, such as "The Feared."These unique invitations are awarded to you when you vanquish specific map bosses that are under the influence of Maven. To give "The Feared" as an example:

The Domain of the Cortex Chayula
The Enticing Depths of the Abyss
The Land of the Shapers
The absence of importance and significance
As a reward for winning all of these battles, you will then be able to claim the Crescent Splinter. The fights against the special invitations are significantly more difficult than those against the ten map bosses, but they reward players with a greater number of Crescent Splinters. After you have collected a total of ten Splinters, you will be able to engage in combat with Maven herself and claim the subsequent Voidstone to complete the mission.

Instructions on how to reach the Uber-Elder
Because of the large number of fragments required, the Uber-Elder is the boss that is the most difficult to defeat. The fight against the Uber-Elder is a battle in which you engage in conflict with both the Elder and the Shaper at the same time. On the other hand, in order to reach that location, you will initially have to vanquish the Elder and the Shaper separately. That indicates that you need to defeat those two bosses first, and in order to do so, you will require the so-called Guardians. It is possible for level 16 maps, known as Guardians, to drop from level 14 maps.

Those who protect both the Elder and the Shaper are known as the Guardians.
On the other hand, in order to reach that location, you will initially have to vanquish the Elder and the Shaper separately.  This indicates that you must first defeat those two bosses, and in order to do so, you will need the so-called Guardians, also spelled Guardians. Guardians are cards with a level 16 that have a chance to drop at level 14.

The following eight cards each feature a boss that is either a Guardian of the Void or an Elder Guardian. There are a total of eight Guardians of the Void and Elder Guardians.

The following maps contain locations where the four Guardians of the Void can be found:

- The Phoenix's Forge in full

- The stronghold of the HydraPit of the Chimera Located Within the Labyrinth of the Minotaur

The following four maps contain one of each of the four Elder Guardians:

- The Radiation EmitterThe restrictive oneThe One Who SlavesThe One Who Cleanses

You will receive one fragment after defeating each boss in turn. After you have vanquished all four Guardians of the Void, you will have access to the four fragments, which will allow you to open a portal to the Shaper and engage in combat with him. If you are able to defeat him, you will be rewarded with a Shaper fragment for the Uber Elder. If you are able to take down all four Elder Guardians, a doorway leading to the Elder will open for you.

You will earn an Elder Fragment for the Uber Elder if you are successful in defeating him. To access the Uber Elder through a portal, you will require a total of two Shaper Fragments in addition to two Elder Fragments. After you have successfully defeated the Uber Elder for the first time, you will be given the fourth Void Stone.