Cerulean Sign

In dNetHack, notdNetHack, and notnotdNetHack, Cerulean Sign, also cerulean weeping-willow, is a functional hallucinatory ward which scares eldritch monsters when engraved on the floor. The Cerulean Sign cannot be reinforced, can't normally be drawn and cannot be learned even after it has been seen. While hallucinating, attempting to draw a ward may sometimes instead draw a Cerulean Sign, and will take as many strokes to draw as the ward that had been attempted to be drawn. It gains no secondary effects at higher levels of reinforcement.

The Cerulean Sign wards monsters as if it were a Elder Sign. Since it cannot be reinforced itself, it cannot ward those monsters only warded by a fully reinforced Elder Sign.

Generation

Rings can very rarely be found on randomly generated rings with a low probability.

Spellbooks do not contain Cerulean Signs.

Reading a scroll of warding while confused normally engraves a ward on the ground that the hero does not currently know. If all regular wards are known to the hero, a Cerulean Sign is engraved on the floor instead.

Polymorphing an existing ward or ring may result in a Cerulean Sign ward, both with low probability.

In the Astral Plane, anachrononauts must invoke the Annulus at the high altar to Ilsensine to complete their ascension, which will destroyed, leaving behind a burned Cerulean Sign.

Description

The Cerulean Sign can't be learned, even if one is found and examined. On the ground, it appears as a "cerulean weeping-willow".

Origin

The Cerulean Sign is the Dungeons and Dragons equivalent of the Elder Sign, introduced in Lords of Madness.