There is only one way to collect the Remnant 2 Void Heart Relic and that is by completing the N’Erud story quest that involves Seeker Keys and the Sha’Hala world boss. You can use this Relic to give you 50% damage resistance for four seconds, then it will rapidly heal you of all your lost health, so it is a very good choice. Moreover, getting your hands on the Void Heart Relic is essential if you want to unlock the powerful Remnant 2 Archon Archetype, so make sure that you are prepared to reroll your campaign or undertake a full adventure run in N’Erud in order to unlock it. Here are the steps you need to follow in order to receive the Void Heart Relic from Remnant 2.
Remnant 2 Void Heart Relic location
There is a main quest on N’Erud that must be completed first before you can obtain the Remnant 2 Void Heart Relic. It has to be the Alepsis-Taura quest that starts in Seeker’s Rest. If you would rather start your campaign in the Forgotten Prison instead, you will need to re-roll your campaign or play a separate adventure.
If you follow the quest through normally, you will speak to the Custodian, collect Seeker Keys, and eventually defeat Sha’Hala: Spectral Guardian of N’Erud, the quest’s world boss. As soon as you have completed the quest, you should return to the Custodian. After taking care of this step, you should be able to continue playing the game for a bit while waiting to move on to the next step, which will actually lock you out of all areas of N’Erud once you complete it – I recommend exploring the area as thoroughly as possible before moving on as what comes next will actually lock you out of all areas of N’Erud. There is also the option to skip a day on your system clock if you really can’t wait.
As soon as you have waited a few minutes, you will now be able to use a Worldstone to fast travel to the Alepsis-Taura locations on N’Erud once you have waited a few minutes. You will end up in a void of space with no N’Erud around you if you choose to do so. There should be a purple object located not far from the Worldstone, so go over there and grab it as it is the Void Heart Relic you need to complete the quest.
You can equip the Void Heart Relic, along with the Remnant 2 Labyrinth Staff and the Remnant 2 Ford’s Scattergun, if you are on a personal quest to unlock the Archon, with the Void Heart Relic in your hands.

