"Due to encountering the Source Material Storm in the [Old World], the investigation team members lost their memory, suspected to be affected by some 'Black Hole Rule Point,' and the fog on the way home is unsolvable."
"Being able to return to the fortress might be because of touching the [Gate]."
The [Gate] is a rule point that the Investigation Corps has confirmed to exist, but it has yet to be clearly explored.
This rule point can connect and span two areas.
Those who touch it can achieve long-distance 'traversal,' although there may be a certain price to pay... Different [Gates] have different characteristics, and what is currently confirmed is that such things only appear in areas rich in Source Material.
In other words, [Gates] can only exist in the North Continent.
