Structural Damage

Certain powers and abilities can unleash widespread destruction, compromising the integrity of buildings, castles, bridges, walls, and other Structures. These effects have a Demolition Score, gauging their capacity to wreak havoc. Structures counter this with their Durability Score which represents their resilience against damage. The extent of damage to structures is represented by levels of Ruin, reflecting their current state of integrity.

To damage a structure you must use a power or ability with a demolition score and target the structure (or have the structure be included in the area of effect). Make a demolition check by rolling 1d20 and adding the demolition bonus. If the result meets or exceeds the structure's Durability Score, then the structure gains a level of Ruin. For each 5 points the check exceeds the Durability Score, the structure gains an additional level of Ruin (i.e. exceeding by 5 or causes 2 Ruin, exceeding by 10 causes 3 Ruin, etc).

Lucky Rolls

A Natural 1 on the roll is considered an automatic failure. A Natural 20 is not an automatic success, but instead is treated to be a value of 25. This means some weak powers may never be able to damage a particularly strong structure.

Multiple Structures

If the ability has an area of effect, it can hit multiple structures (or multiple sections of a structure) provided that each structure can be mostly encompassed (greater than 50%) by the area. Otherwise the power is limited to a single structure (or section of a structure). Also see Protective Structures, below.

Resistance and Vulnerability

Some structures are resistance or vulnerable to certain damage types. The demolition roll gains a +5 bonus if the structure is vulnerable, and suffers a -5 penalty if the structure is resistant.

Protective Structures

Some sections of a structure may defend other sections of the structure, such as a thick stone wall around a castle. In this case, the defending section suffers damage first. If the attack razes the protecting structure, at the GM's discretion any remaining levels of Ruin may be applied to the protected structure (if the protected structure has a Durability score equal to or less than the protecting structure). This also requires that the ability used to attack the structure can to spread beyond to the protected structure (i.e. must be within the area of affect and able to target multiple structures). For example, if you get a Demolition roll of 47 against a stone wall, with a durability of 30, the wall gains 4 levels of Ruin. Since the wall already has 4 levels of ruin. 3 levels of Ruin cause the wall to be Razed. If appropriate, the remaining 1 level of Ruin is applied to the stone castle behind the wall. If the castle were constructed of heavy metal, however, having a Durability of 55, the castle would suffer no damage.

If a creature is taking cover behind a protective structure and the protective structure is breached, the creature suffers from the full effect of the attack (i.e. it is not dampened by the structure), though it may still have Cover from what remains of the structure.