The power to obtain supernatural powers through objects. Variation of Equipment Usage.
Object of Power
The user has access to an object that grants them supernatural powers, these can be magical objects of great or destructive power, or technological weaponry. If the user already possesses supernatural abilities, the objects are mostly meant for letting them access and/or enhance their powers, or grant them new abilities.
Kratos (God of War); via various weapons and accessories (most notably the Blades of Chaos/Athena/Exile). It should be noted that Kratos is also granted innate, magical powers over the course of his storyline by various gods and other entities.
Ichigo (Bleach) uses a manifested shinigami blade of his powers.
While wearing the mask, Ichigo's (Bleach) Hollow powers supplement his Shinigami powers, giving him a vast increase in strength, speed, durability and spiritual power, including augmented his Getsuga Tenshō.
Grimmjow Jaegerjaquez (Bleach) using the Caja Negación cube to create a pocket dimension field to imprison Ulquiorra Cifer.
Yukio (Bleach) using his Fullbring ability via his game console to create a pocket dimension.
When the Visoreds put on their Hollow Masks their power augmented, increasing their strength, speed, and durability, some are equipped to fire a Cero like Hollows.
When Kaname puts on his Hollow Mask, his strength and speed increase and develops high-speed regeneration.
D.R. (Monsters) wielding the Dragon Horn, which allows him to summon and control dragons.
The Devil Fruit (One Piece)
Pandora's Box (Code:Breaker)
The Philosophers Stone (Fullmatel Alchemist: Brotherhood)
Shikon Jewel (InuYasha)
Tetsusaiga and Tenseiga (InuYasha)
Death Note (Death Note)
The Artifacts of Darkness (Yu Yu Hakusho): Orb of Baast, Forlorn Hope and Shadow Sword.
Sailor Moon (Sailor Moon) with the Silver Crystal
Reiki (Tenjho Tenge), in the hands of a special power user, can negate all special powers.
The armor, Eternity, and sword, Instant grants eternal life and deflection of attacks (Pokemon Manga).
Jewel Girl (Valkyrie Crusade) can gain a specific power from each jewel (Black Pearl: Exorcism. Hematite: Victory Inducement. etc)
Malachite's Hand (Channel Awesome) was a powerful artifact that grants the user limitless magical power. Because the original gauntlet was old and unfashionable, the stone that powers it was grafted onto a Nintendo Power Glove.
Aeon (Channel Awesome - Suburban Knights) crafted a ring made from lodestone that could reflect Malachite's magic back to him.