Barrel of Boomsticks
Boomstick Barrels are available on the Expedition only. These are currently unlocked via Artillery. A single Boomstick Barrel will most certainly destroy a splitrail fence. 3 are required to destroy stonehedge. Once players obtain brick walls boomstick barrels would be a very expensive proposition to blow a hole through brick. They are on a 2 hour timer so players are encouraged to check and make sure no suspicious barrels show up on their claim.
They don't need a Trial by fire to do damage.