Repeal the rule “Integrity”.

In the rule “The Building”, after the bullet that begins with “Optionally, by spending 1 from any of their Materials”, add the following sub-bullet:

* * If they do so, and the Material has the Supportive Property, increase Building Stability by 25. Decrease Building Stability by 25 if the Material has the Heavy Property and the Block is not on the bottommost Level.

and after the bullet that begins with “Choose a non-Empty Block”, add the following bullets:

* If the Block that was swapped with an Empty Block contains a Material with the Heavy Property, decrease Building Stability by 25
* If the Level of the Block that was swapped with the topmost Level now contains 3 Empty Blocks, decrease Building Stability by 50