Possibly the Greatest Alchemist of All Time

Three months after the hero summoning Takumi's town has grown and been named Wedgefort. The heroes begin visiting other kingdoms, scaring believers of the Church of Creation. Papek hires Takumi to escort the heroes to the royal capital Bakilatos. Akira and Yamato begin casually abusing innocent people. Akane, with her blessing of Revelation, senses something she needs in Bakilatos. Akira and Yamato barge into the Bakilatos Guild and attempt to buy Máni and Sofia, only for Takumi to refuse their demands. Takumi then destroys Akira's sword and takes down Yamato after they charge at him. The heroes leave but swear revenge. Akane realizes Takumi is what she has been searching for and flees to Takumi's hotel with her loyal slave Lulu. Takumi admits he was the fourth hero accidentally summoned by Sidonia and sent to the past by Nolyn. Akane realizes Sidonia only summoned heroes to legitimize Anat and gain more followers for when they declare war. Akane shares her belief Akira and Yamato's personalities only changed due to being drugged, which she avoided with Purification Magic. At Akane's request, Takumi removes Lulu's slave collar. Takumi decides to take Akane and Lulu to his home and informs King Lobos Barcula what happened. An army of monsters attacks Wedgefort. Takumi cancels all his slave contracts, wanting everyone to stay with him by their own choice. He also constructs two swords; Holy Sword Amaterasu and Sublime Sword Tsukuyomi. The Guild sends an emergency summons to Takumi and all A and B Rank adventurers to urgently defend Wedgefort. (Source: Wikipedia)