A Legend spawned from a seed.

There was once a seed in which will cause the surrounding crops to grow. And it is in this seed that the essence of the river of light is sealed in.

If this seed is buried in the ground, the surrounding crops fluorishes for a year. This is known as a goodbye harvest, in return, it takes the life of the people who benefited from it. This seed can save 1000s from starvation at the cost of 1 man's life. Though planting this seed in itself is wrong as you know that it will cost a life to save many ... still it does take a life.

In a village in the mountains somewhere... There are farms and crops whom fluorishes when there is a natural disaster saving people from starvation. But they fear that someone will die from the curse that is ... the goodbye harvest.
.....

In a particular year, the years harvest was talked about forever. At that time a strange legend was again born. That year, the goodbye harvests ended... that rice that was made, revived a man and made him immortal. It was said he would come back from time to time and tell people new ways to cultivate the lands.

I always liked folk stories....