Leon and the alchemy master he was communicating with did not get along smoothly; the other's polite words hid a formulaic attitude toward the various materials Leon sought, barely better than outright impatience to send him away, with no care for Leon's status whatsoever.
Of the few rare materials, the first was the Yisuya Essence Soul Stone, which the alchemy master claimed never to have heard of.
Eternal Ice, which the guild indeed had some of, but required an extremely expensive price to purchase.
Melted Mountain Gold was priced even more exorbitantly.
As for Moonfall Secret Silver... Leon was sure that when he mentioned this item, the other's face twitched almost imperceptibly. The alchemist's attitude was strangely rigid in his refusal, stating that without the king's command, the guild would absolutely not sell such a priceless ancient mithril, not at all, as every grain of it was strictly guarded.