Ubume

“Boss. Aren’t you too greedy? You are selling this husky mutt for 500,000?”
A cute girl in a ponytail held a husky puppy, whose eyes looked exceptionally wise, in her arms as she glared at Lin Ye. Her gaze was accusing him of being a dishonest trader.
Lin Ye explained, “Miss, I have to formally inform you: this is not a husky mutt.”
The girl retorted, “Don’t you dare trick me.”
“I’m serious. It has the bloodline of Cerberus. Its potential is limitless.”
The girl was stunned by Lin Ye’s words. 
After pondering for a moment, she realized that what he said was absurd. Agitated, she yelled, “Are you sure? I don’t believe it!”
Lin Ye gestured at the husky in her arms as he said, “Little fella, get down and show your future owner what you can do. Go!”
“Woof!”
The girl shrieked in horror as she witnessed the little husky spit out a fireball the size of a fist.
……
Many years later, Lin Ye has crowned the Father of Beast-taming of the Blue Planet. When he was interviewed, he said forlornly, “It all started with a husky mutt.”
At the same time, in a mansion, a gigantic red dog with three heads sneezed. Then, it barked at the television before it.
“Woof!”

I Made Beast-taming Widespread Across The Globe

"After a beast reaches high level three, it needs to evolve once and break through the limit of its current life form before continuing to increase its level."

"Moreover, the further they go, the more difficult it will be for them to level up.

"The energy required will also increase."

Hearing Lin Ye say this, Yang Wei and the surrounding people looked at the big turtle thoughtfully.

Hong Zhijie, who had just obtained a good quality beast, looked at Yang Wei and asked curiously,

"Ah Wei, how much did you spend to feed it to this size?"

Yang Wei touched his chin and thought for a moment.

"According to Shop Owner Lin, I started feeding using low-level mutated beast cores."

"When it was about to reach level two, I directly fed it level two crystal cores."

Concentration Fruit, Evolution Grass