Different World: Why Is This a DNF System?

Traveling to the game world of sword and magic, the DNF system awakened. [Main mission: Blacksmith Linus] [Mission Objective: Go to the Elvin Defense Line to visit the blacksmith Linus] [Mission reward: Wild strawberry × 3, nettle flowers and leaves, a small amount of EXP] system. You tell me. I'm in the continent of Brescia. Where to find Linus? ! What should you do if you encounter this situation? ! Waiting online, it's very urgent!