For a gallery of examples for Powers Via Object, see here.
Powers Via Object
The Crimson Gem of Cyttorak (Marvel) is the source of The Juggernaut's powers.
Obtain supernatural powers through objects
The power to obtain supernatural powers through objects. A variation of Affinity.
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 he user already possesses supernatural abilities, the objects are mostly meant for letting them access and/or enhance their powers, or grant them new abilities.
Juggernaut (Marvel Comics); had to touch the Gem of Cytorrak to initially receive his powers, not needed afterwards.
Various Lantern Corps (DC comics); each have rings that provide various themed abilities.
Alan Scott (DC Comics); via magical power ring and lantern.
Amazo (DC Comics); via copying Green Lantern's Power Ring.
Shocker (Marvel Comics); via his gauntlets
Mysterio (Marvel Comics); via his tech and special effects
Dr. Octopus (Marvel Comics); via his tentacles
Green Goblin (Marvel Comics); via his tech.
Falcon (Marvel); flight via his wing harness
Captain America (Marvel); via the Super Soldier Serum
Black Cat (Spider-Man: The Animated Series); via Super Soldier Serum
Star Girl (DC Comics)
Star Man (DC Comics) (2nd)
Ben Tennyson (Ben 10); via the Omnitrix/Ultimatrix
Guardians of the Temples (Legend of the Dragon); via Powerbands
Thor (Marvel); via Mjolnir.
Captain Marvel (Marvel); via Kree Nega-Bands
Rhino, Scorpion, Shocker, Dr. Octopus, Venom, Carnage, and Vulture (Spider-Man, Marvel); via their costumes
Thanos, then Adam Warlock (Marvel); via the Infinity Gauntlet.
Dio Brando (JoJo's Bizarre Adventure); via the Stone Mask
Mandarin (Marvel); via his 10 magical rings.
Noah/Grimoire (Soul Eater); via the Book of Eibon
Mala Mala Jong (Xiaolin Showdown)
Will Vandom (W.I.T.C.H.); as keeper of the mystic Heart of Candracar
Trixie Lulamoon (My Little Pony: Friendship is Magic)
Rex Salazar (Generator Rex); via the five Meta Nanites
Bondi Band (Bondi Band); via Hexarocks
Rennek (Charmed); via the All
Prue Halliwell/Patience (charmed); via the Book of Shadows/the Nexus/Emphyreal Sword/the All
Lyra Belaqua (His Dark Materials); via Alethiometer
Will Parry (His Dark Materials); via Subtle Knife
Wizards and Witches (Harry Potter)
Lord Voldemort (Harry Potter); via the Elder Wand
Albus Dumbledore (Harry Potter); via the Elder Wand
Harry Potter (Harry Potter); via the Elder Wand
Shadowhunters (The Shadowhunter Chronicles); via steles and holy weapons
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.
Shinnok (Mortal Kombat); via his amulet
Sonic characters (Sonic The Hedgehog); via the seven Chaos Emeralds
Link (Legend of Zelda); via his Triforce of Courage