AD&D 2nd Edition

Range: 0
Components: V, S
Duration: 5 rds/level
Casting Time: 2
Area of Effect: 10 x 180 ft
Saving Throw: None

This spell discovers emanations of evil (or of good in the cast of the reverse spell) from any creature, object, or area. Character alignment is not revealed under most circumstances: Characters who are strongly aligned, do not stray from their faith, and who are at least 9th level might radiate good or evil if they are intent upon appropriate actions. Powerful monsters, such as ki-rin, send forth emanations of evil or good, even if polymorphed. Aligned undead radiate evil, for it is this power and negative force that enables them to continue existing,. An evilly cursed object or unholy water radiates evil, but a hidden trap or an unintelligent viper dies not. The degree of evil (faint, moderate, strong, overwhelming) can be noted. Note that priests have a more powerful version of this spell. The spell has a path of detection 10 feet wide and 60 yards long in the direction in which the wizard is facing. The wizard must concentrate – stop, have quite, and intently seek to detect the aura – for at least one round to receive a reading.