Toz's fire spread through the fortress and climbed its walls to reach the ceiling. And if the Fortress of Death was caught up in flames, there was no way that the chamber Toz was in would remain intact. If anything, it was the opposite.
As the center of Toz's inferno, the Fountain of Death's chamber was almost entirely melted. Only a few beams of stone held out and kept remnants of the ceiling afloat, but they were quickly dripping to the ground and joining the pool of molten rock surrounding Toz and the Fountain of Death.
Toz was nearing his goal, but he wasn't quite yet satisfied, and he continued fanning the flames and pushing them to roar even more furiously. The flames avariciously devoured his mana, but Toz didn't care. He singlemindedly forced himself and his fire even further.