There are 14 Dark gods based around the 7 virtues and 7 sins.
They are wielders of the Corruption and will use their powers as they see fit.
Each Dark God is formed by the corruption and usually takes form or appearance as a host body which has been overtaken and reconstructed by the corruption.
Only powerful beings will be chosen. (for example the great wizard who didn't understand the power and let it escape from the Infected Realm to Minearchy)
Each god has a purpose.
7 Virtues can control other corrupted beings and will use their specific virtue-powers to control the minds of their victims.
7 Sins can lure non-corrupted beings using their specific sin-powers to lure the minds of their victims so they can be easily corrupted.
Even though the corrupted minds are suffering(what's left of it anyway) and the land that gets corrupted is foul it still has a lot of potentials to the dark gods and the corruption.
Something corrupted that looks dead and barren from the outside can provide many nutrients and can be reshaped and remolded into other corruption elements.