The reason no life could exist on Ennoudu Plains was thanks to the actions of the Mystic Tentacles. It was unknown for how long they existed. Some clues state that they have been there since the birth of Sumatra Continent.
And since the start, they had unlocked the path to Mystic Grade. Every era on Sumatra Continent birthed a Mystic Tentacle.
After a few eras, the then Mystic Tentacle intended to create a new power for its race. In research towards that, it turned towards the power of a Parute Tree.
Even though it was rare, once a cultivator reached the peak of cultivation, they could communicate with their ancestors in the Transcendent World. Through it, the Mystic Tentacles of every era were able to know what was happening in the Transcendent World.