For someone who patiently spent centuries stuck underneath the dangerous soil of the Forest of Calamity with a grand plan to reclaim everything later, to get so angry that he was screaming expletives like a hot-blooded enraged teen, there was a reason that other than him, nobody was aware of in the present world.
It began with the story of a group of sworn brothers, who decided to rob people as a way to survive in the wicked world of that time. At least this was what they thought of themselves.
Their origins were different, and their choices, and hence, their journeys were different as well, but once they came together, although they weren't able to earn everything that they desired, they were able to loot enough to survive lavishly.