Karn enjoyed a rare stretch of peace. After taking Hermione out for a day in London, he turned some of his attention to the world of ordinary people.
He created several shadow clones and used the Transformation Technique, along with money to smooth the way, to obtain several sets of identification.
Then Karn exchanged some money for pounds and headed to the stock market to make a little money. This year happened to offer a good opportunity to build wealth, but he was too late. The financial oligarchs had already taken the profits worth making, leaving Karn to make a little money based on what he remembered.
Even so, he could multiply his wealth several times over. Karn could exchange that money for gold, then use it to acquire magical resources in the Wizarding World.
Half the money he earned would go toward developing his local strength, and the other half toward buying gold. With a legal identity secured, Karn no longer needed the security company's help even to rent a place, as he had before. He could legitimately invest in businesses as a local citizen.
Naturally, these matters were left to his shadow clones. Karn now had a considerable amount of chakra. After creating three shadow clones, he could have them maintain the Transformation Technique for an entire day, making them difficult for others to detect. The Extremis Virus could also offset the side effects of the Shadow Clone Technique, as it happened to be capable of sorting out the impact of a large influx of memories.
He only gave the shadow clones' memories a cursory look. Unless something unexpected happened, Karn would not deal with them. Although wizards existed here, Karn's ninjutsu was no worse than magic. The combination of the Shadow Clone Technique and the Transformation Technique,