The Red Training king was the strongest one that Lin Zhen had killed so far.
Indeed, luck played a significant role in his victory over the Red Training King, which was largely due to the latter's ignorance of Lin Zhen's tactical secrets and his underestimation of him.
If they knew each other well, even in a one-on-one match, Lin Zhen might not be a match for the Red Training King.
Of course, this refers to hard power, like the contest of Star Power. In reality, Lin Zhen has many trump cards, which usually allows him to unleash astonishing fighting power.
The memory of the Red Training King is far more than any memory Lin Zhen had absorbed before, after all, the Red Training King came from the Endless Species, and what he learned greatly differs from Lin Zhen's past experiences.
Even in alchemy alone, there is a great difference between the Endless Species and the Ground Clan.
The Ground Clan emphasizes on the heat control of the elixir, paying more attention to the means.