The Mystical Orb (originally called the Giant Ball of Death) is a weapon used by Moloch the Oni Destroyer, which resembles a stone sphere with chains wrapped around Moloch's arm and also has strange line markings on it. It first appeared, along with him, in Mortal Kombat: Deadly Alliance and again in Mortal Kombat: Armageddon.
In Mortal Kombat: Armageddon, it doesn't seem that Moloch possesses it, 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 game's Konquest mode as well.
In Mortal Kombat 11, Kollector uses this weapon specifically in his Head Lantern Fatality.
- The Orb appears to be based on the Ball and Chain, which was a type of shackle historically applied to prisoners from the 17th century until as late as the mid-20th century.
- Moloch's Ball and Chain is one of the many Faction Wars exclusive Equipment Cards in Mortal Kombat Mobile.
- It is so far the only item that grants the wielder a chance of Lethal Damage, if Freddy's Glove is excluded by granting Freddy Krueger an additional Nightmare victim.