The Sack Man's Eye is a mystical jewel which replaces the right eye of Sack Man, it has become a part of the Sack Man and can not be removed nor destroyed - it is also the source of the Sack Man's true power.

The Sack Man's Eye grants him virtual omnipotence within his native reality, allowing him to effortlessly reshape the laws of physics to his will - outside his native reality however his influence is much more limited.