Dragon Engine Strength Reference 2

The dragon engines had already arrived at the palace of Kroog and were slamming their great shovellike muzzles as battering rams against the walls.

The hallway rocked, and half of it slid away, breaking apart under the assault of the engine. Stonework and furnishings suddenly collapsed as if a great blade had cut through the palace itself. In the wake of the cave-in, more of the hallway slid into a churning dust cloud.

***

Mishra, now known to Yotians as the Butcher of Kroog, had abandoned the city, and his dragon engines left little standing. The massive walls themselves had been left untouched, though their mighty gates had been worked from their hinges and splintered. Everything within the walls had been burned, and that which resisted burning had been crushed beneath the dragon engines' treads. A gray rain of ashes and dust fell on the city for three days after the razing. There was little looting afterward because there was little to loot. All that was left were the walls and a slope of gray rubble leading down to the Mardun River, and beyond the walls a scattering of lean-tos belonging to refugees too stubborn or stupid to move elsewhere.

***

There was a great pile of rubble that had been burned, blasted, and then cleared. At first Sharaman thought it had been a great court, but he soon realized that it was the site of Urza's orniary and that it had been scraped down to bedrock. Urza stood in the dead center of the cleared circle and knelt down, putting his hands over his eyes. There was not even any rubble left for him to touch.

***

The Brother's War, Chapter 15-16