Chapter 132-got it!
Translator: 549690339
Why?
this was because, compared to ordinary and rare classes, it wasn't that easy to change to a legendary class.
The basic requirements for a legendary building were units with legendary potential, points, and various hero imprints.
some legendary buildings did not have any special requirements for the hero's mark.
However, some buildings required the corresponding hero's Mark. Although the legendary class that was converted from such buildings was more powerful, the difficulty of obtaining the hero's Mark caused most of the buildings to be of little value.
As for [ slaughter destruction Wolf Palace ], its attributes were undoubtedly very powerful.