Hreckra II was a dying planet in the Hreckra system. It was covered in a toxic swamp which housed no life when Ferret landed there to perform experiments. She set up a somewhat badly designed power plant that drew electricity from the core to power her equipment.
Ferret managed to live there for several years with no ill effects because her enhanced physiology rendered her immune to the deleterious effects of the environment. She created various kinds of flesh golems through her experiments, as well as other things.
Enraged at having to abandon her research, Ferret departed with K'theenya aboard the Drunken Ferret as the planet exploded in the distance.