Facing the terrifying energy that the Origin King unleashed before vanishing, Chaya had no other options. At this point, no matter what methods he used, trying to forcibly withstand that energy was unwise. With himself almost driven into a dead end, Chaya could only make one desperate gamble.
Since a clash of power and escape through space were both impossible, he had to seek a chance of survival from the perspective of the timeline.
Thus, in the end, Chaya staked everything on the move known as Reversal.
Reversal was an advanced application of spacetime laws that directly involved causality. It was an even more complex technique than the dreamlike method of Extinction, requiring extraordinarily powerful control. Fortunately, Chaya had reached the fifth level of the divine realm in spacetime; otherwise, he would have begun to collapse before he could even use it.
Once Reversal was used, it meant traversing the timeline. It was a true crossing through time, something only the Time God, who had fused the past, future, and present, could perform.
The wonder of both Extinction and Reversal lay in their ability to avoid the creation of parallel spacetime.
Extinction destroyed an individual, embedding a phantom into the timeline to replace the person it had erased. But Reversal was different. It was utterly domineering, directly changing the past at its source and reversing causality. Once Chaya returned to the past, every action he took would forcibly alter the future.
For example, if Chaya wanted to kill the God of Destruction Beerus, he could use Reversal to return to when Beerus was still very weak. If he killed the weakened Beerus and then returned to the original era, everything related to Beerus in the new era would be forcibly altered. Everyone would believe that Beerus had died long ago.