Possibly the Greatest Alchemist of All Time

Possibly the Greatest Alchemist of All Time summary: Takumi Iruma, an ordinary man, unintentionally joins a team of heroes summoned to a new dimension. The goddess responsible for the error offers him the chance to pick any skill he desires. Hoping for a peaceful life, Takumi chooses the unremarkable skill of alchemy. Yet, unbeknownst to him, this talent is incredibly powerful, allowing him to create anything from holy swords to flying ships. This newfound ability propels him into success as a merchant and an unbeatable warrior. Experience Takumi's heartwarming journey as he blossoms into the greatest alchemist in existence.