In the first image, we are able see Vez'nan destroys the wall of a castle.
It is from 10:38 of this video
QQ图片20221016091453.png
https://www.youtube.com/watch?v=i6SholGTm5o
The length of the castle is 720px, and the height of Vez'nan is 29px
Assume Vez'nan's height is 175cm, we can calculate that the length of the castle is 175cm/29*720=43.448276m
Since this image doesn't show the left side of the wall of the castle and the height of the wall of the castle, I use the data in wikipedia. A typical wall could be 3 m (10 ft) thick and 12 m (39 ft) tall
https://en.wikipedia.org/wiki/Castle
QQ图片20221016093917.png
And in the second image in 10:48 of this video https://www.youtube.com/watch?v=i6SholGTm5o, the debris of the destruction are big stones, so we can assume that the wall is filled by stone.
So the volume of the wall is \(3m*12m*43.448276m=1564.137936 m^3=1564137936 cm^3\)
According to https://vsbattles.fandom.com/wiki/Calculations?so=search ,Vez'nan turned the wall into fairly large and distinguishable pieces.
So his feat is 1564137936 cm^3*8J/cc=12513103488J,Large Building level
这个计算有2个问题：1.破碎应该用剧烈粉碎进行计算
2.应该把墙上士兵的高度算作1.7m