Symbol of Stunning
This spell functions like symbol of death, except that all creatures within 60 feet of a symbol of stunning instead become stunned for 1d6 rounds.
Note: Magic traps such as symbol of stunning are hard to detect and disable. A rogue (only) can use the Search skill to find a symbol of stunning and Disable Device to thwart it. The DC in each case is 25 + spell level, or 32 for symbol of stunning.
Mercury and phosphorus, plus powdered diamond and opal with a total value of at least 5,000 gp.