Crystals

Artifacts, potions, materials, guns, and everything that anyone can imagine made their entrance to the auction. At this point, Arthur had seen so many items being bought by grandmaster Venkov that he questioned if this guy was a smuggler. 

"A daughter of a wealthy family indeed…" Arthur muttered as the grandmaster raised the bid over a set of feathers. 

"See, I'm the only sensible person of the family." Emma laughed. However, Arthur had also seen her make some bids over things. Through halfway through the auction, the moment finally arrived. 

"Our dear bidders, please calm down and listen to what I want to say. We all know how rare the fire element is and how difficult it is to produce an artificial artifact. That's why we present you this. A set of ten fire weapons, Blades of Flames!"