Collapsing Egorian Building
COMPLEX HAZARD 18 +35 (expert) to notice cracks forming in the walls of the structure
Tremors from the changing landscape could cause a building to collapse.
DC 45 Athletics (master), DC 45 Crafting (master), or DC 45 Engineering Lore (master) to brace the structure against collapse until the end of the creature's next turn. The DC of the flat check for this round (see Routine) decreases by 4 on a success (or by 8 on a critical success). Decreasing the flat check DC to 0 stabilizes the structure, ending this hazard.
Shake to Pieces
The Hellfire tornado moves adjacent to the building
The building trembles. The floors of the building and the streets within 30 feet of the building become difficult terrain; creatures on this difficult terrain take a –2 circumstance penalty to attack rolls, AC, and skill checks. The hazard rolls initiative.
(1 action) The GM rolls a DC 11 flat check, decreasing the DC as noted above. If the check fails, dust and debris fall within the building and 30 feet around it, providing concealment for 1 round and dealing 10d6 bludgeoning damage to 1d4 randomly chosen targets in the area (DC 40 basic Reflex save); a target that critically fails this save is also knocked Prone. If the flat check critically fails, the effect is the same, but damage from the debris increases to 16d6, it affects 2d4 randomly chosen targets, and a creature that critically fails its save is knocked prone and Restrained by the rubble (Escape, Force Open).
The building becomes susceptible to Shake to Pieces again 1d4 rounds after it's stabilized.
Pathfinder Adventure Path: Hell's DestinyORC