What to Do If You Transmigrate Into a Fantasy Adventurer?

He was transported to a fantasy adventure world of swords and magic. After reading the Fireball spell from the mage skill book given to him upon registering with the Adventurers' Guild, Allen aimed it at a training dummy and began chanting a meditation spell. "Magic skills require daily practice; even the best newcomers need months, even years, to master them..." Before the crippled dwarf could finish speaking, a blazing fireball with a smiling face flew from Allen's palm. Allen then went to the "Return to the Furnace," a place that specialized in recycling junk, and bought a broken staff. "So you're planning to use this broken staff as a flail to smash those monsters?" the dwarf couldn't help but complain, only to notice the broken staff, now wrapped in strips of cloth, shimmering with a dazzling purple light. Even after the two set off on their adventure, the dwarf teased Allen, who stubbornly insisted on heading in a certain direction. "This..."