Symbol of Insanity
|Level:||Clr 8, Sor/Wiz 8|
|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.
Mercury and phosphorus, plus powdered diamond and opal with a total value of at least 5,000 gp.