Yet not everything that had already happened could be reversed.
Just as its name implied.
"Reverse Effect into Cause" required Fang Xiao to understand the causes and consequences involved before he could use the power of the Heart Dao to bring it about.
Of course, he did not need to know every minute detail. Knowing the general chain of cause and effect was enough.
Just like before.
Fang Xiao's wave of the hand was the cause, and the shattering of space was the effect. This was the simplest kind of karmic connection.
The simpler it was, the less power of the Heart Dao "Reverse Effect into Cause" consumed.
Correspondingly, the more complex and weighty the cause and effect, the greater the consumption naturally became.
If the required consumption could not bear the burden of that causality, then this ability naturally could not be used.
But put another way, if one could bear the consumption, then even withered trees returning to spring, or even reversing life and death, would no longer be mere fantasy.
There was one point worth mentioning: the minute details between cause and effect.
They could be absent, but that did not mean they were unimportant. Naturally, they had their own role to play.
In an event of cause and effect, aside from the main trunk of causality, the more details Fang Xiao knew, the more he could reduce the consumption of the Heart Dao's power.
Take the shattering of space just now as an example.
Fang Xiao remembered every detail of that shattered space—the collapse, flow, and reassembly of Space Force. He had seen it all with perfect clarity.
Thus, the power of the Heart Dao he ultimately consumed was actually exceedingly little.
It had not even reached the point of making the Dao Tracks fall silent.