War King Rise from the Land of Destruction

The Earl issued a decree inviting suitors, granting a baron's useless second son a title and a piece of land, giving him the chance to skip thirty years of hard work. But this land wasn't easy to acquire, as it was the infamous Cursed Land. Upon learning about the situation, the useless second son was so terrified that he died on the spot. At that moment, a soul from Earth took over his body...

What? Cursed Land? This is clearly a land of fortune! Haven't you seen how well I'm living now? Haven't you noticed how happy my serfs are? Dark creatures? Sorry, that's just the delivery service...

This is a magical world, where meteor showers occur every Sunday. Among the falling meteors, there's a chance that magical treasures in the form of elemental sprites will appear. The known sprites are as follows:

Green sprites: They can increase crop yields.
Purple sprites: They can randomly enhance the quality of plants.
Yellow sprites: They can randomly cause the land to contain certain minerals.
Blue sprites: They can turn the land into a habitat favored by certain creatures.
Of course, most of the time, what falls during the meteor shower isn't necessarily a sprite; more often than not, it's dark creatures...