Merlin did a great job studying the history of this world. Whether it was the stories from the mouths of the people, or the contents of the books had been through his eyes.
Since he had promised Prince Finley that he would help, he certainly would not disappoint him. He also wanted the Four Spirits Stone and the Crystal Civilization's map.
He certainly wouldn't let what he wanted slip away.
After Merlin studied a whole lot of information, he found one rope in this competition.
If you could grab this rope, they would definitely have a huge advantage during the first fifty years of the war.
Everything, whether the dominion, war, or socio-economic aspects in this heir competition was realistic. There were also beliefs and cultures. Most of these could be used as weapons of war.