"Echo Instance" is currently the most popular playing method among heavy-duty gamers.
Using the mechanism of black-haired zombies for a fixed farming spot is certainly not the level up method prepared by the designers for the players.
In order to provide players with reasonable and rich battle scenarios, Lincoln provided the developers with the idea of "Memory Echo".
Players, during missions and exploration, will obtain an item with the suffix "Echo" in its name. Using these items, they will be transported into a portion of the item owner's memory. In these memories, there tends to be a large amount of combat, providing players with rich battle enjoyment.
Some NPCs can even repeatedly transport players into a specific memory - this is considered a fixed instance.
And most Echo Instances have a leaderboard that records the ten fastest teams.