monopoliser (noun)

1. In the novel, the monopoliser of the oil industry creates a complex web of corruption and deceit.

2. The real estate developer acted as a monopoliser, controlling both the construction and sale of luxury condominiums in the city.

3. The supervillain in the comic book series is a powerful monopoliser who seeks to control all sources of energy in the world.

4. The haunted house was owned by a mysterious monopoliser who used the ghosts to terrify and manipulate the visitors.