If it’s a disc harrow, yes it’s used to break up the ground and cut up vegetation (corn stalks, grass, etc.) just not as deep as a plow. Setting the angle of the axles on the disc gangs controls depth of cut. It also busts up plowed ground into a more level bed with smaller clumps. Hook a drag to the back and it makes a good seed bed. If you want a seed bed for a garden or food plot for deer a tiller may be great. If you want a seed bed for 50 acres, the OP has the thing to do it efficiently and effectively.
Back in the day spent many days running one after school until well after dark. Have an old one in the shed but haven’t had it out in probably 35 years. No use for it now.
I’d also like to see the MX running it if OP is up for posting some pics or a short video.