At most, at most.
It would just mean losing the war and ceding territory with compensation.
When the side that ceded territory and paid compensation regains strength, the war will naturally continue.
If they win, they can take back the territories previously ceded and gain more land as well as compensation.
But if they lose, they simply need to retreat and bide their time, waiting for the right moment.
This cycle continues.
Both sides will shine for thousands of years, one after another.
However.
Though the great wars between Deity Transforming Holy Lands won't lead to a mutual destruction in the eyes of He Song and Han Yuezi.
This "won't lead to mutual destruction" only applies to the two Holy Lands.
If it's just a Nascent Soul cultivator participating in the war.
The start of this war could very well be a disaster for them.
In the Deity Transforming Holy Lands, masters are like clouds.