This item is acquired in-game. See its sources below.
A Rare Key, item level 10, binds when picked up.
First seen in build 5.5.4.69585 (Mists of Pandaria).
Spell effects bound to this item, from first-party game data.
Key of Shadows uses icon file 134236, which 23 other items also use. The 8 closest by item ID:
Shattered Halls Key ID 28395 · KeyShadow Labyrinth Key ID 27991 · KeyRestored Apprentice's Key ID 24489 · QuestThird Key Fragment ID 24488 · QuestPolymorphic Key ID 95056 · Consumable · item level 35Polymorphic Key ID 97155 · Consumable · item level 35Executioner's Key ID 8444 · ConsumableMiddle of Gelkak's Key ID 7499 · QuestBlizzard numbers items as they are created, so the named items next to ID 53156 (53134 to 53161) were usually added in the same batch as Key of Shadows: the same quest line, zone, vendor or reward set.
Phaseshifter's Bracers ID 53134 · Armor - Leather · item level 35
Glowing Soil ID 53135 · Quest
Soul Essence ID 53136 · Quest "Soft wailing can be heard from the glowing light."
Twilight Overseer's Key ID 53139 · Key
Agamaggan's Thorn ID 53155 · Weapon - One-Handed Sword · item level 20
Charlga's Cowl ID 53157 · Armor - Cloth · item level 20
Spaulder of the Matriarch ID 53158 · Armor - Leather · item level 20
Naralex's Slippers ID 53159 · Armor - Cloth · item level 19
Vest of the Nightmare Rift ID 53160 · Armor - Leather · item level 19
Wailing Ring ID 53161 · Armor · item level 19The raw ItemSparse values for item 53156 in the current client build.
Read from the World of Warcraft client build files: Item, ItemSparse, Lock, Holidays, AreaTable and CollectableSourceVendor.
TheWoWDB