SRD:Symbol of Insanity
From D&D Wiki
|This material is published under the OGL|
|Enchantment (Compulsion) [Mind-Affecting]|
|Level:||Clr 8, Sor/Wiz 8|
|Components:||V, S, M|
|Casting time:||10 minutes|
|Range:||0 ft.; see text|
|Saving Throw:||Will negates|
Unlike symbol of death, symbol of insanity has no hit point limit; once triggered, a symbol of insanity simply remains active for 10 minutes per caster level.
Note: Magic traps such as symbol of insanity are hard to detect and disable. A rogue (only) can use the Search skill to find a symbol of insanity and Disable Device to thwart it. The DC in each case is 25 + spell level, or 33 for symbol of insanity.
Material Component: Mercury and phosphorus, plus powdered diamond and opal with a total value of at least 5,000 gp.