The Nightmare Amulet is an item found in the Magic tab and is one of six amulets. It can be used to experience the effects of Sanity loss.

The Nightmare Amulet, when equipped, allows the player to experience the effects of 0 Sanity. This can be very useful for collecting items that are only present during low sanity levels, such as Nightmare Fuel and Beard Hair. As well as this, the screen will become distorted with the usual low sanity effects, and Shadow Creatures will spawn. When taken back off, the player will return to their previous level of sanity - although this "previous" level of sanity may actually increase or decrease as per normal, including (but not limited) due to the amulet itself.

While wearing the Nightmare Amulet, the player also loses 3.33 sanity per minute. This sanity loss is taken from their "actual" sanity - that is, the sanity they would have if they weren't wearing the amulet. This sanity loss will only become apparent once the amulet has been removed or has worn out, in that the player's sanity level will be lower than it was prior to wearing the amulet.

The Nightmare Amulet's induced effect cannot be used to raise or lower Obelisks.





The Magiluminescence seems to share the same model as this amulet.
Prior to the The Stuff Of Nightmares update, the Nightmare Amulet actually restored 2 sanity per minute instead of reducing 3.33 sanity per minute.