Kobold Miners

+10: Weaken Wall: The kobolds cause 5-10 feet of wall space on a damaged building to become precarious. If the dragon makes an attack within five feet
X: of this wall, it collapses dealing 1d10 damage per five feet of the wall.
+10: Pitfall: Each kobold digs a 10 foot square hole in the ground. If the dragon touches one of these squares, its movement is lowered by 10 feet.