Ready to upgrade your Crawler Armor set? And upgrade again? And again? If you haven't guessed it by now, after the process the armor parts becomes leveling items. By right clicking on it you raise it's quality instead of equipping it.
Note: Prowler Armor is NoDrop, so you need to do the process yourself.
To make this item you'll need one item from Crypt of Home (one item for each armor piece that is). It's called Damaged Proliferation Unit, and drops from the Alpha SkinCrawler that spawns amid all the Skincrawlers. It is one of the dungeon bosses with lots of HP, so don't think the fight will be easy! Since there's little you can do with a damaged tool, you need to repair it first: