Symbol of Weakness
School necromancy; Level cleric 7, sorcerer/wizard 7
Components V, S, M (mercury and phosphorus, plus powdered diamond and opal worth a total of 5,000 gp)
Unlike symbol of death, symbol of weakness has no hit point limit; once triggered, a symbol of weakness simply remains active for 10 minutes per caster level. A creature can only be affected by this symbol once.
Note: Magic traps such as symbol of weakness are hard to detect and disable. While any character can use Perception to find a symbol, only a character with the trapfinding class feature can use Disable Device to disarm it. The DC in each case is 25 + spell level, or 32 for symbol of weakness.