As the flames increased, the temperature within the large lecture hall became too much for many to handle. They were forced back away or even out of the room.
Only those that had withstood flames for a longer time were able to handle the heat. They had been fighting heat and gaining resistance to heat for many years. That was what came with alchemists that used fire. It was similar to the blacksmiths that worked in front of flames at all times.
However, there was something that many had noticed. The potion in the cauldron was rapidly reducing. But along with that, it was also resisting the influence of the old monster alchemist and of Remey.
Ignus's eyes focused more on this fact than he had focused on things before. Onyx could sense the worry that was coming from Ignus. Specifically because of the flames growing.
Creation is hard, cheer me up!