Did you reach depth 30 in a single transformation? That's gameplay the developers didn't anticipate. If you complete the depth 20 checkpoint and then go to the blacksmith, you can get the Greed Armor. But if you skip that and reach depth 30, you end up in a dead end of sorts.
Just between us, I plan to update DDT soon. As you know, I've released TDC, so that will be the main focus of development. I intend to make a debug version of DDT publicly available. That should help you escape the dead end.