Mokivj was a planet, located near the borders of the Unknown Regions and Wild Space, that suffered a catastrophe caused by the spreading lava from an effort to destroy a Separatist cortosis mine in 19 BBY by Anakin Skywalker, Padmé Amidala, and Chiss Commander Thrawn. Before the catastrophe, it had been a planet with lush grasslands and forests. Following the Battle of Atollon, Thrawn, now a Grand Admiral in the navy of the Galactic Empire, and Skywalker, now the Sith Lord Darth Vader, were sent to investigate a disturbance in the Force felt by Emperor Palpatine. By that time, there was only lifeless plains and deserts across a great swath of the surface.
The Grysks used their advanced technology to move 4 of the planet's moons out of orbit and into the path of hyperlanes by this time. They were stopped in the process of moving another moon, leaving it drifting away from Mokivj.
During the Clone Wars, Count Dooku of the Confederacy of Independent Systems received vital information from an unknown species, regarding the a rare metal that could block lightsabers. Dooku would dispatch Duke Solha, as well as his brother and sister, to Mokivj to mine, and process the metal. The Separatists kept the planet on lockdown. The residents could not leave their encampments and the areas around the settlements were patrolled by droids.
Eventually, Duja, former handmaiden to Padmé Amidala, would go to investigate and discover the Separatist occupation. Duja would be killed by orders of Solha, her corpse would be outside of the bar on Oga's Cantina, on Batuu. Duja may have died, but she sent a message to Padmé in time. Padmé would eventually do your own investigation and head to Batuu, then eventually, Mokivj. She would disappeared from the Galactic Republic for several months. It wasn't until Jedi Knight Anakin Skywalker to do his own journey to find out where his wife was. Skywalker's search would be above Batuu, where he met an unidentified starship. The ship would be underneath the command of Chiss Commander Mitth'raw'nuruodo of the Defense Fleet of Ascendancy. Their search would led them to Batuu, like Padmé's search did. They would eventually find her and take down the mine, but the destruction would be catastrophic for the planet.