"You have never seen one of these monsters before. However, you were capable of healing it?" the light devouring dragon clearly had some issues with what he had seen. It didn't make any sense.
These people from the world had appeared with skills that did not fit the normal events of what someone would go through within the elemental planes. Even on top of that, they were growing stronger at a faster rate than what he had ever seen.
Plus, he had just witnessed them heal a monster that they had never seen before. Nowt many could do this, even the sages had very limited abilities to heal. Therefore, it was a surprising fact that the party before him had managed to heal incredibly severe damage done by an undead.