Spore Evolution: from the Weakest in History to the Lord of Dragons

"The giant dragons and dragonborns dominate the sky, the earth and the ocean... Human beings can only survive in the cracks, looking forward to a comeback day and night." Animals, plants, elements, undead, machinery... Red salamanders, night wolves, quartz white armored spirits, wind eagles, earth bears, mysterious foxes, and even the legendary five-color dragons and ancient relics that gave birth to spirits can all be used as contract beasts. The humans who contract, train, and control them are collectively called beast masters. Ren Gall, a poor kid from the suburbs. His parents sold their house and everything in exchange for a lowly gray egg for him. But when the eggshell cracked, what floated out from the inside was a small cloud of gray spores. The weakest contracted beast in history, with a 1 in 10,000 chance of going to hell. Everyone thought that his best future was to become cannon fodder or a slave of the upper class. But he went from spore to dragon, from rotten to lord of dragons. All the way to the throne of the Dragon God, thousands of dragons bowed their heads.