The Territory Furnace came under attack at the fourth minute of a Grade Seven trial, which nobody has since been willing to call a coincidence. Cain Dorr held a carrier position under the northern frontage plus a schedule telling him the hour Vell Ardan would be unreachable.
He did not go near the chamber himself, since a man with four regulator plates left does not spend one on masonry. He drove a Directorate carrier into the Furnace regulation from eleven kilometres out, through a position the recovery teams had logged as dead.
A carrier of that pattern does not break a Furnace by force. It argues with the regulation until the regulation has spent everything it holds on the argument, then the chamber shuts itself down to survive.
[Territory Furnace: external carrier detected.]
[Regulation load: rising.]
