Empire Builder 3: Breed, Populate, Conquer

Ben has set his sights to the north, where a tower reaches to the heavens.
But first, he will need to gain the favor of a master deep within the dungeons outside his own tower.
With this new master's training and his new children, Ben is ready to venture north and claim what is rightfully his.
Inevitably, things prove more difficult than he could have ever imagined, and The One Who Rules All could be Ben's undoing.