Gang, how do I know if the underground can give me soul of light and dark?

I legit have to corrupt the underground and nothing is giving me souls. I went to the hollowed desert and went underground and they still won't give me souls. Gang, what did I do wrong

Thank the Lord I use summons

Blood moon + pirate invasion. Legit I a nightmare. Everytime I go out of my safety box I die. I legit don't wanna die

The Nail

A mighty tower was erected and plunged into the earth. Our bravest men guard it's walls against the ever-spreading corruption.