As the name suggested, this type of formation was passed down from ancient times!
As a matter of fact, Ancient Divine Formations were a lost art or else the Mage Imperial Universe warriors would have felt puzzled. The name itself implied might. Anything that could be related to Divinity would naturally be powerful.
In the universes, there were some perilous lands and historic sites that contained Ancient Divine Formations. Those were practically unbreakable. Some of them were dissolved naturally after long years, but they could not be broken down by men.
If it really was an Ancient Divine Formation over the mountain, the odds of it being cracked by the warriors could be very low unless they were going to stay here and pound at it for decades or hundreds of years…