This Master Is Clearly Overpowered, Yet Far Too Cautious

[Summoning + Beast Taming + Passion + System]

The birth of Beastmasters gave humanity, once the rulers of the planet, a chance to rule it again.

Ghost calamities, demon calamities, monster calamities.

These were the greatest obstacles to humanity's dominion over the planet.

A thousand years of struggle had changed nothing.

Then a soul that had transmigrated from Earth changed everything.

Humans will never be slaves!