"Something Isn't Right!"

The alchemists suspected the Sloan Family to be hiding an elf somewhere...or maybe they got a talented alchemist that had the same ability as the elves. 

However, even when they're curious, they know that it's not their problem to inquire about the Sloan Family's secret. 

Their problem now was to identify and test the potions. 

"I have never seen these potions before, so I think the only one that can have the final say is the guild master." The senior alchemists pushed the final decision on Geraldine. 

However, since Geraldine wasn't here, they could only try the potion themselves to know the effect. 

"Find the potion slaves, and get them to try these potions." The vice head ordered the younger alchemist to find slaves to try the potions. 

After all, there were cases where the potions they tested were fake. 

Thus, they had to find people to try the potions for them...and they got the slaves to do that, called the potion slaves.