During her self-imposed exile, Lema began to create the fastbreeders, which she nicknamed "Hexes". In order to make the droids unique and highly adaptive, she put her very essence into them in the form of red liquid. After cloning her long lost daughter, Lema was determined to keep her safe and programmed the hexes to protect the clone of Cinzia at all costs. As the years go by, Lema and the colony grew fearful of the hexes and tried to shut them down. The hexes killed her because in their logic, shutting them down would put Cinzia in danger. The hexes killed the rest of the colony when they tried to stop them from killing Lema. Lema still existed in the red liquid that filled the hexes bodies and a Force-dampening tank in which she kept the clone of Cinzia in all her life.
During the attack on Sebaddon, Grand Master Satele Shan and Eldon Ax confronted the clone of Cinzia/Eldon Ax. Lema could still talk to her through the liquid and when the clone disobeyed her by talking to the two of them, Lema began to smother her. In a desperate attempt to save the drowning clone, Satele Shan broke the glass of her tank. Once exposed to air for the first time, the clone fell into shock and died. Out of grief of losing Cinzia twice, Lema commanded all the hexes to dig into the core of the world where they would be swallowed by the lava, destroying the last piece of herself.