Powerful Objects

Some Objects in fictional universes (such as the DC,Marvel,W.I.T.C.H) can grant superpowers to the wielder some of these objects have a mind of its own

The Power Ring
In the DC universe these objects are considered to be the most powerful weapons in the universe.It is fueled by the user's willpower. Some of its notable powers are:
 * Create constructs of energy.
 * Feed on emotions which would increse/decrease the rings power.
 * Blast beams/blasts of green cosmic energy.
 * Create impenetrable shields for protection or trapping persons.
 * Ability to be travel anywhere at lightspeeds.

Mandarin's Rings of Power
In the Marvel universe the villain Mandarin posseses rings that would grant him various powers. Notable powers are:
 * Shoot beams of electricity,ice,flames.
 * Wield the Darkforce.
 * Control Magnetic forces.
 * Rearrange Matter.

The One Ring
In The Lord of the Rings the Dark Lord Sauron created this ring which made him invincible. When the ring was removed from Sauron's finger he lost his physical form and was forced to get the ring back. Some of its powers are: In W.I.T.C.H a ring called The Mage Ring could open portals to other worlds.
 * Grant the wearer invisibility.
 * Corrupt the wearer.
 * Grant invincibility to Sauron and keep his physical form.

The Hearts of Candracar and Meridian
In W.I.T.CH the Hearts of Candracar and Meridian are the sources of magic to their worlds.The Hearts of Candracar took the form of a pendant while the Heart of Meridian at first was embodied in Elyon but was later imprisoned in a jewel making it the new physical form of the Heart of Meridian. Its notable powers are:
 * Control the elements of Water.Fire,Earth,Air and Quintessence.
 * Create Portals (this process is called folding).
 * Develop Psychic abilities.
 * Warp Reality.
 * Enhance Personal powers.
 * Energy and Matter manipulation.

Pendant of the 1st Hokage
In Naruto the 1st Hokage had a pendant that increased his ability to surpress Tailed Beasts, The 5th Hokage Tsunade wore it but passed it to Naruto,Yamato/Tenzo who had the abilities of the 1st Hokage uses the pendant to tame Naruto whenever he would turn into the Tailed Beast,during a fight with Pain Naruto destroyed the pendant.