Black Powder Bomb
Level 6HazardAbilities
Trigger One of the three kegs takes any fire damage, including damage caused by a line of black powder burning up to a keg. --- Effect The keg explodes, causing 5d6 fire damage (DC 24 reflex) in a 20-foot emanation; this can cause an instantaneous chain reaction if either of the other kegs are in this area (note that as positioned, all three kegs are in range to trigger a chain reaction). Fire damage in overlapping areas isn't cumulative, but if all three kegs are in their initial positions when the explosion occurs, the temple itself collapses, causing 8d6 bludgeoning damage to all creatures in the temple (DC 24 reflex).
Description
Three bulky kegs of black powder placed at key locations in the temple are triggered to explode in unison, causing the entire structure to collapse into rubble and slide partially down the cliff face.