They have an Item Level of 63 and require a character level of 1. They can be stacked up to a maximum of 100.
"Could this key really allow its bearer access to a plane of unholy terror? Perhaps if its missing counterparts were found..."
The Key of Terror will drop from Xah'Rith the Keywarden at Stonefort in Act III.
Subtle Essence • Shimmering Essence • Wishful Essence • Exquisite Essence • Demonic Essence
Fallen Tooth • Lizard Eye • Encrusted Hoof • Iridescent Tear • Fiery Brimstone
Pages of Training
Page of Blacksmithing • Page of Jewelcrafting • Tome of Blacksmithing • Tome of Jewelcrafting • Tome of Secrets
Wirt's Bell • Liquid Rainbow • Gibbering Gemstone • Leoric’s Shinbone • Vengeful Eye • Devil’s Fang • Writhing Spine • Key of Destruction • Key of Hate • Key of Terror • Infernal Machine