Chen Xu carefully examined the entry for the 'Magic Extreme Blood Residue Charcoal'.
He found it quite interesting. The so-called extreme emotion was due to Black Wind Roar previously falling victim to Chen Xu's magic, beating himself half to death in extreme fear—
The intense emotions released during that near-death experience were the 'extreme emotion'.
There are many types of extreme emotions.
Aside from the extreme fear and resentment at the brink of death, any intense emotions close to extreme love, hate, passion, and enmity could be considered 'extreme emotion'.
However, most creatures' emotional capacity is actually limited.
In Chen Xu's view, for most creatures in the world, extreme hate is always easier than extreme love.
And the intense emotional outburst at the brink of death is perhaps the easiest 'extreme emotion' to acquire in the world.
