You trace these mystic runes upon a book, map, scroll, or similar object bearing written information. The
runes detonate when read, dealing 6d6 points of force
damage. Anyone next to the
runes (close enough to read them) takes the full
damage with no
saving throw; any other creature within 10 feet of the
runes is entitled to a Reflex save for half
damage. The object on which the
runes were written also takes full
damage (no
saving throw).
You and any characters you specifically instruct can read the protected writing without triggering the
runes. Likewise, you can remove the
runes whenever desired. Another creature can remove them with a successful
dispel magic or
erase spell, but attempting to dispel or
erase the
runes and failing to do so triggers the explosion.