Portal
From MYSTlore
Spoiler warning: the following contains details about puzzles, plot, or similar. If you're not familiar with them already, continuing to read may affect your experience.
The Portal is a symbol that appears at noon in the pods of the pod age, and disappears 30 seconds later. Anyone who touches the Portal in this time is taken to the Bahro cave of the Third Journey. The Portal emits a strong cyan hue.
At this point, nothing is known about the workings or the purpose of the Portal.
