Mirage Energy does not continuously spread around just because it leaks from the Tower of Bravery; the natural spread of Mirage Energy has a limit. Beyond this limit, nearby active Mirage Creatures are needed to ensure that the concentration of Mirage Energy exceeds a critical value in order to continue its expansion outward, otherwise the spread of Mirage Energy will halt.
The essence of Mirage Energy is based on the sensory system of the Mirage Tapir, which can perceive the space within a certain range around it. Beyond this distance, Mirage Creatures must act as 'detectors' to continue the outward diffusion, allowing the Mirage Tapir to gain a visual on more areas.
Of course, there is a limit to this expansion.
The sensory range of the Mirage Tapir's body, stretching from the Teleportation Array at the lakebed of the Real World up to the server entrance, and further expanding to the outskirts of White Maple City in the Star Spirit World, is its ultimate limit.
