Reincarnated as a Brave Man, I Bring My Own Two-In-One Panel

Xiao Jian, who was playing a game, was sucked into a different world by a magic skill released. When I woke up, I found that I had traveled through time and became a civilian brave, appearing in the Western magical world, dungeons, sky cities, steampunk cities, empires integrating magic and technology, dragons and monsters... When he adapted to this body, he realized that he had been summoned by the Archmage Merlin to save this lost world. "Damn it, old man, why don't you hang up after saying something?" Merlin breathed his last! Bite! The panel pops up. The [2-in-1] panel is currently activated! Everything can be upgraded two-in-one! This... Pick up two wooden sticks and spend one silver coin to synthesize a wooden sword! Two pieces of iron are combined into ordinary iron pieces? One copper coin is made into a piece of hardened iron. One silver coin, synthetic alloy iron sheet, One gold coin can be used to synthesize a smelting iron sword. Potion...