Having served as an undercover agent for many years, Wan Ke knew the Heavenly Court fairly well.
Throughout the Heavenly Court's territory, not even those Supreme Great Emperors possessed Gold Grade crystal cores. Yet he knew that the spatial teleportation array in the inner region had a Gold Grade crystal core!
Since the Heavenly Court had arrived at the Annihilation Sea, they had not encountered any sea beasts at the upper Great Emperor level. Even Supreme Great Emperors could only make do with silver grade crystal cores.
According to the information Wan Ke had gathered, this sole Gold Grade crystal core of the Heavenly Court had once been obtained by the Heavenly Emperor!
This showed just how astonishing the Heavenly Emperor's methods were!
Back then, the Heavenly Emperor had come here alone. His cultivation realm had not even been particularly high, yet he had managed to obtain a Gold Grade crystal core.
The spatial teleportation array Wan Ke spoke of had in fact been constructed with a Gold Grade crystal core as its core.
It was precisely by drawing upon the power of that Gold Grade crystal core that the spatial teleportation array could function over this Annihilation Sea, connecting to the Heavenly Court's headquarters and allowing vast quantities of resources to be transported through it at any time.
With this spatial teleportation array, the Heavenly Court had gained a measure of advantage in its battle against the Ancient Immortal Realm.
Naturally, that advantage was only temporary.
Using crystal cores to fly across the Annihilation Sea or perform spatial shifts would consume the power within them.
Under normal circumstances, that consumption was negligible.
Even a Black Iron Grade crystal core could presumably sustain flight for a year, while a silver grade one would last even longer.
The Gold Grade crystal