The Mystical Orb is a stone orb with strange line markings on it and chains on it wrapped around the right arm of Moloch the Oni Destroyer and it is his custom weapon. It is one of the many objects in Mortal Kombat universe.
- It was once known as the "Giant Ball of Death".
- In Mortal Kombat: Deadly Alliance, it was seen in a concept art sketch as being carried off by an owl named Moloch's Herald before being returned to Moloch's hand.
- In Mortal Kombat: Armageddon, Moloch was seen in battle with his Mystical Orb, but it appears during his Versus Render, and during some of his special moves.
- It was featured as one of the collectible Relics under the name "Moloch's Ball" found within the Edenian Ruins in the Konquest mode of Mortal Kombat: Armageddon.