Monarchs are all the same, let alone the Tribulation-Crossing Immortals.
Within this world, any Tribulation-Crossing Immortal, even the youngest among them, had gone through tens of thousands of Reincarnation Cycles.
Among them, there were even dozens of incarnations that had cultivated to the Monarch Realm.
The total time any Tribulation-Crossing Immortal had spent in cultivation was calculated in hundreds of millions of years.
Of course, although this world has reincarnation, memories are obscured by the rules after reincarnation.
It is only when one cultivates again to the Deity Transformation Realm that memories gradually begin to awaken.
This means that if one has bad luck, they might not awaken their memories even after tens of thousands of reincarnations.
Of course, if one is lucky, they might awaken their memories in every one of their ten reincarnations.
If one truly had that kind of luck, perhaps they could have achieved immortality in their first life.