Pathfinder 1e Item: Mythic Amulet of the Abyss

A mythic amulet of the Abyss bears the rune of a single demon lord on its face, indicating the lord to which the amulet is attuned. At its basest, a mythic amulet of the Abyss functions as an unholy symbol to this demon lord as well as a phylactery of faithfulness.   A mythic amulet of the Abyss grants its wearer all three of the demon lord's boons, which can be found in Pathfinder Campaign Setting: Lords of Chaos, Book of the Damned, Vol. 2.   Additionally, the wearer of the amulet gains a +4 enhancement bonus to natural armor, immunity to electricity and poison, and resistance 10 to acid, cold, and fire.   Finally, any lawful or good character who wears this amulet gains 2 negative levels. These negative levels remain as long as the amulet is worn. These negative levels never result in actual level loss, but they can't be overcome in any way as long as the amulet is worn.