They didn’t possess summoning grimoires, hence they wouldn’t be able to gain experience and level up during battle. They also didn’t have the ability to receive the rewards for the level up from the Ancient Laws. For example, Fatty Hai’s Iron Rhinoceros had not only evolved into a Silver-horned Rhinoceros, it also gained a new ability, [Steel Bones]. Ye Kong was so jealous that he almost drooled.
The difference between owning a grimoire or not lies in here.
Xue Tan Lang didn’t reveal the reward for his level up, he continued to maintain his cool guy appearance. However, the joy that couldn’t be concealed in his eyes was obvious for everyone to see. Seems like he got quite a nice reward.
Prince of Tian Luo’s element-type beast, “Skyfire Meteor” had levelled up too. However, it was a Gold-ranked beast in the first place, hence it didn’t evolve.
Amongst the people, the one that levelled up the most was neither Xue Tan Lang, nor Fatty Hai… It was Yue Bing.
Her Hundred Years Treant Defender had evolved into Thousand Years Treant General after levelling up.
It had levelled up to Silver-ranked Level 5 from Bronze-ranked Level 5. Thousand Years Treant General was much bigger than Hundred Years Treant Defender, and it also looked more human. It also possessed Ancient Tree’s Heart. Ancient Tree’s Heart was extremely important for Treants, because as long as their Ancient Tree’s Heart was intact, a Treant would never die. The Thousand Years Treant General had not only gained higher combat power, it had also gained stronger life force… Treants’ evolution path was Treant Warrior, Hundred Years Treant Defender, Thousand Years Treant General and Ten Thousand Years Ancient Tree King.
Yue Bing’s Treant was only one step behind from possessing the Ten Thousand Years Ancient Tree King, that no one else in this world had.
With the Tree’s Heart, it marked the start of the Treant’s ability to evolve more human-like, and become a Holy Beast.