In the movie, the Sons go into the basement of the Colony House, and Caleb Danvers uses The Power to get the Book of Damnation off the bookshelf.He shows the other other three Sons of Ipswich the book that lists the names of the others during the Salem Witch Trial of the people that were charged, and how the name Charles Putnam was one on the list and how Agnes Goody Pope claimed that John Putnam came to her in her dreams as an incubus, after she was widowed.
Her husband, Jacob, died June 4, 1692. Her son, Hagan, was born on April 11, 1693 which is 10 months and 24 days later. Which means that Chase Collins was a descendent of John Putnam through the Pope family, and that's how he had The Power.
- For some reason, the Book of Damnation doesn't have any information detailing how The Power came into existence.