Void Erosion Purge can be can be accessed starting at Mastery Rank 18 after completing the relevant Sub Quest.

The main rewards for the Void Erosion Purge are Weapon Cores.

 

The Void Erosion Purge can be accessed via the Infiltration Operations Terminal or the Void Erosion icon on the World Map when the following conditions are met:

1) Reach Mastery Rank 18

2) Complete the Quest [Disseminating Response Policy to the Void Anomalies] from the 'Descendant Instructor' NPC in Albion

 

The next Void Erosion Purge stage only unlocks when the current stage is completed within the given time,
and Erosion Purge stage progress is reset every season.

Dying during an Erosion Purge incurs a penalty that reduces the target time.

 

The Void Erosion Purge results are determined as follows, and the main reward for completing a Void Erosion Purge is a Weapon Core.

- Erosion Purge Complete: If you complete the mission within the target time of 10 minutes, you will receive the mission completion rewards and unlock the next stage.

- Mission Complete: If you complete the mission but exceed the target time of 10 minutes, you will receive the mission completion rewards but the next stage won't be unlocked.

- Mission Failed: If you fail to complete the mission and exceed all 15 minutes of playtime, you will not receive the mission completion rewards and the next stage won't be unlocked.

 

Matchmaking for Void Erosion Purge is only available in the stages where Start Public Operation is available.

- Start Public Operation is available: Stages 1/5/9/13/17

- All other stages are only playable using Start Private Operation.