There are seven gods of this world. Those ruling over the four elements along with the god of craftsmen and creativity, the god of thieves and cunning, and the god of commerce and wisdom. These seven gods can each contract a single godchild of their choosing. These godchildren gain divine protection and a blessing in the god's attribute. In return, only the best of the best can be chosen. One such godchild was Toa. Originally from a small village in the outskirts, his parents were murdered brutally by bandits. His father, a blacksmith, left behind his workshop and Toa, having nothing else to do, looked at his father's currant project and vastly improved it. The kingdom gathered interest in his invention and gave him a contract. The weapon, despite its simplicity was powerful and efficient and is said to have improved the strength of the kingdom's army threefold. Toa was six years old at the time...

After working for the kingdom as their top pioneer in various fields, Toa managed to save 50 million gold pieces, more than the total combined wealth of the 5 poorest nations combined.

one gold coin is a large amount, and even the kingdom's own treasury contained only 300 million all told. An insane amount for any one individual. Using this as an investment, a number of stores, restaurants, smithies, and inns were opened all across the nation, yet not even one establishment ever went into debt. At this point, he was chosen as the godchild of creativity. He was only 26 years old. He then, getting bored of business, gave up his name and started wandering the world as an adventurer. It was then, that a problem arose. Toa was weak. Not just average, he was weak almost to the point of malnutrition. About to give up on the adventurer life, he decided to challenge a dungeon. Research led to a dungeon known unflatteringly as the weakest dungeon. Lacking any traps or monsters, and having no treasure to boot, along with a constantly patrolling, insanely powerful, dungeon boss, there was no point to even try to conquer it. Why risk your life for a copper when you can risk an arm for a silver right?

Thus finding a dungeon with a glaring weakness, he started to prepare. Using laboratory mice as scouts, over a week's time, he mapped the labyrinth until possible by tying differently colored threads of uniform ad very long length to them and instructing each to take a different route. Then the color of the smallest ball of thread was the route that should be taken. Of course, the vampire lord acting as the dungeon boss could not notice he thread as he was blind. Vampires are not an especially strong species. In fact they are just bat type demi -humans that use echolocation as a primary sense. They are naturally blind on account of lacking eyes. The threads are too thin to find with echolocation and mice naturally exist in the dungeon. Thus, it was impossible for him to notice.

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Note: Imagine a human face, without the eyes(or sockets) and extra large teeth. Of course in a black suit.

Toa's POV:

After observing for a few months, he leaves the dungeon for an extended period of time, once reaching three days. After further observation, the way to invade was naturally discovered. the rats were once again sent to follow paths and stop at dead ends where other mice were not waiting and have them starve to death waiting them (contract magic is awesome).

Measuring the sizes of various strings, nine of 28 were of an appropriate length. I started scouting for three hours monthly when the boss leaves for what I assumed was some sort of dungeon meeting or something. According to rumors, the dungeon has only one floor but I immediately found stairs. they led to a 3x3 empty room. creating a map on the way, I found doors in two places, of which one was an obvious dead end. The doors were designed to drain mana as they opened only if supplied 20 units. Also for some reason, I can't regain mana in the dungeon. Its actually a very good combo cause if I were to run out of mana, I'd be forever trapped by the draining doors. Also, mana potions are extremely expensive, starting at a white gold coin a piece. Well, I'm rich so that's alright. I'm actually carrying three containing 300 mana worth each.

After crossing door after door, I noticed that the doors were the only thing in the goddamn dungeon. After a very long dead end, wasting two hours, and finding two rooms to the side which I promptly ignored, after 8 doors, the dungeon core. I formed a contract with it for an additional 100 mana and took over as the new dungeon master. By the way, the vampire is still the dungeon boss, and according to my contract with the core, he must do everything I want him to. Overpowered minion: GET!

Note:

1 stone coin=1 unit (value: rock on side of road)

1 iron coin=100 stone coins=100 units (value: a candy or something)

1 copper coin=100 iron coins=10,000 units (value: cheap shirt)

1 silver coin=100 copper coins=1,000,000 units (value: a month's expenses)

1 gold coin=100 silver coins=100,000,000 units (value: house)

1 white gold coin=100 gold coins=10,000,000,000 units (value: medium sized building)

Toa's fortune=50,000,000 gold coins=5,000,000,000,000,000 units (value: 1 trillion usd=12.85 bill gates)