The character write instructions or other information on
parchment, paper, or any suitable writing material. The illusory
script appears to be some form of foreign or magic writing. Only
the person (or people) designated by the character at the time of
the casting are able to read the writing; its completely
unintelligible to any other character, although an illusionist
recognizes it as illusory script.
Any unauthorized creature attempting to read the script
triggers a potent illusory effect and must make a saving throw. A
successful saving throw means the creature can look away with
only a mild sense of disorientation. Failure means the creature
is subject to a suggestion implanted in the script by the
character at the time the illusory script spell was cast. The
suggestion lasts only 30 minutes. Typical suggestions include
"Close the book and leave," "Forget the existence
of the book," and so forth. If successfully dispelled by
dispel magic, the illusory script and its secret message
disappear. The hidden message can be read by a combination of the
true seeing spell with the read magic or comprehend languages
spell.
The casting time depends on how long a message the character
wishes to write, but it is always at least 1 minute.
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