"Spirit Seed (Excellence++): Created by Lord Tianyuan, who expended a great deal of energy to condense this special creation. The user can inject spiritual power into it to communicate with other holders of a Spirit Seed at any time. This special creation has a wide range of communication."
"Note: The power of the Spirit Seed slowly dissipates, and after a certain period, the creation will lose its effectiveness."
If analyzed using a high-order detection crystal or similar tool, one could obtain the effects described above.
Communication in the Eternal World was already inconvenient, and it was especially severe in the Red Mist Land.
Within the range of the Shattered Isles Warzone—Land of Miracles, various communication devices could still function normally. However, once leaving the battle zone and stepping into the ominous land permeated by the Red Mist, communication would often be hindered; even a slight increase in distance rendered the devices completely useless.