Saleen was scaring Daniel, because he wanted to use this opportunity to acquire some obscure materials. Even though these abyssal creatures were not of a high grade, they were still unique and precious to the mages of Myers in this day and age.
Had these abyssal materials been acquired earlier, Sregl Island would not have had to employ an extreme method such as sealing the island to deal with their complicated situation in the first place.
However, there had been no alternatives either. After all, Sregl Island could not fall out with Alchemy City, but heat-tolerant equipment could be produced from the materials from the abyssal creatures, and they would have no issues entering the volcano anymore.
Saleen looked at the dead abyssal creatures with much regret and said to Daniel, "In that case, you don't have to do any other work anymore. Just concentrate on summoning the creatures in the death dimension during this period of time."