Almost all "random" elements in games are pseudo-random, and "Fallen Chronicles" is no exception. Renji had already figured out that "Fallen Chronicles" randomness is greatly influenced by the user. In reality, this means it would likely consider the user's emotions, thoughts, and inner desires to narrow down the range for pseudo-randomness.
As long as Renji kept thinking about the Dragon Nation and focused his emotions on it, when he activated the Hearthstone Tear, if the Tainted Deviation were triggered, it would almost certainly teleport him randomly within the boundaries of the Dragon Nation.
This was a way to "sneak in" without having to "open the map."
Of course, the prerequisite for all this is that Renji needs to trigger the "very small probability" of the [Miasma Deviation] effect.
For an ordinary person, they might not be able to trigger it even after a thousand tries.
'But if it is her...'
Renji's gaze landed on Eileen.