Orb

The Orb was a spherical artifact with unimaginable power.

Background
Shao Kahn discovered the Orb which would have given him ultimate power over the Realms and even reduce Raiden to the status of a mortal. This artifact, known only as the Orb, was part of the plot that involved the resurrection of the sorceror Shang Tsung who would use the Orb in order to give Shao Kahn victory over his enemies.

The Orb possessed the powers of the elements and was capable of manipulating them allowing the user to harness wind, water, earth and fire. It was discovered that the more manevolent the user, the more intense were the powers of the Orb. Using the power of the Orb, the user was capable of creating environmental disasters that spanned the entire realm.

Essentially, the Orb was not evil as it was am embodiment of nature and was driven to evil. After Shang Tsung was defeated, Raiden threw the Orb into a dimensional rift whre it was lost among the realms.

Source

 * Defenders of the Realm - Resurrection