"Oh how the tables have turned, man thing..."

Long ago, humans were the true scourge of the lands, capturing and enslaving other creatures for their own gain, ruling with unchecked cruelty. But their reign of terror came to an end when the orcs, united by the desire for vengeance and freedom, rose against their oppressors. In a sweeping rebellion, the orcs liberated the enslaved and turned the tide, overthrowing their human captors. Now the orcs are the dominant species, treating humans with the same harshness they once endured, as the roles of master and slave are bitterly reversed in a world reshaped by orcish might.

Basically, instead of mystical creatures being captured and enslaved to human owners, it's the other way around.