The heat produced by the explosion of the bomb stone is also short-lived. It will char a body in an instant, but it won't linger on as flames.
The bomb stone clearly has a lot of defects. But if someone wants to cover up the fact that they stole a lot of energy water from a certain store and also fake their death at the same time, a bomb stone is the ideal fire starter to use.
The bomb stone will react with the energy water left in the scene and take the blame for the disappearance of the energy water that was stolen.
In the case of the base of the lamp bearers, the job of the bomb stone was to create a large shockwave that simulates the effects of an earthquake and cause the whole building to collapse.
Legion didn't care that there were knights still in the building. All they cared about was that Bushwick had taken his men to the base before it exploded. That was why the explosion went off after Bushwick got to the base.
