You can protect yourself more effectively, at the expense of your shield.
Archetype
Feat type
Archetype Feat
Level
10
Traits
Archetype
Prerequisites
Bastion Dedication
You can protect yourself more effectively, at the expense of your shield. When you Shield Block, you can reduce the damage to yourself by double the shield's Hardness, but if you do, the shield takes double the normal amount of damage it would have taken (before applying its Hardness). You can't use Destructive Block if your shield can't typically be broken or destroyed, such as if you're using an indestructible shield.
Source: Pathfinder Player Core 2, p. 187
Bring Destructive Block into a Pathfinder 2e game with The DM Screen.