As Niamh was known to build powerful weapons against many Beings, the Gods were careful to approach the Jester. During a particular fight they were able to capture her and a few comrades and sealed her off, unable to perform an execution on her.
For eons, her sarcophagus was cast into the Earthen into the earth of a planet. As parts of Natalis became prospects of mining, the sarcophagus was uncovered and with it the powers that kept it in place. A group of undead rose and defended the place.
It was a small group of sellswords that uncovered the sarcophagus and opened it. The Jester was uncovered and freed, allowing the monster to roam the world once more. She was quickly fought off a night later.