The deep ravine stretching across the mountain's edge, endlessly extending for over a thousand miles in width, was originally a Realm Ravine between the Immortal Realm and the Demon Realm. Neither immortals nor the Demon Clan would cross it lightly, or it would be considered a provocation, triggering a life-and-death battle upon encounter.
Though situated within the Demon Realm territory, the Demon Flame Crystal Sea, being very close to the edge of the Immortal Realm, contains countless cultivation resources, tempting numerous immortals.
Hence, some immortals lacking cultivation resources and eager to break through would band together, flying across the thousand-mile-wide Realm Ravine, risking ventures into the Demon Realm territory seeking opportunities.
The Demon Flame Crystal Sea, considered hazardous by Immortal Realm immortals, is viewed as a Cultivation Holy Land by Demon Clan experts, drawing large batches of them for training each year.
