Defenses

If there's a physical component that a character could break, you'll need to determine the hazard's AC, Fortitude save, and Reflex save, using the extreme, high, and low values (preceded by E, H, or L on the Hazard Defenses table) as well as its Hardness, HP, and Broken Threshold (BT). When building a purely magical or formless hazard, you can skip this section.

Some hazards, even high-level ones, don't make sense with a high Hardness value. In those cases, you can skip the Hardness and use the HP values from the Hit Points table. Especially for complex hazards, you might want to divide the durability over multiple sections, located in different positions, to encourage teamwork and mobility.