Reaper Harvester

I have trained for over twenty years on my planet Ombidiron to be a Reaper Harvester.
A Reaper is trained to plant seeds on barren planets.
The Reaping begins after the season draws to an end and the seeds have grown into strong healthy plants.
The Sower masterfully plants the special seeds at the start of the season on the fertile soil.
When the harvest season arrives the Sower becomes the Reaper and gathers the abundance given forth by the soil of the planet.
The Warrior races of Guzon wipe entire planets of their inhabitants. Every creature and plant is destroyed on a captured planet.