Symbol of Sleep(Player's Handbook v.3.5, p. 291)
Enchantment (Compulsion) [Mind-Affecting]
Level: Cleric 5, Sorcerer 5, Wizard 5, Wu Jen 5, Sha'ir 5, Court Herald 5, Magewright 5, Apostle of Peace 5, Sloth 5,
Components: V, S, M,
Casting Time: 10 minutes
Range: 0 ft.; see text
Effect: One symbol
Duration: See text
Saving Throw: Will negates
Spell Resistance: Yes
This spell functions like symbol of death, except that all creatures of 10 HD or less within 60 feet of the symbol of sleep instead fall into a catatonic slumber for 3d6×10 minutes. Unlike with the sleep spell, sleeping creatures cannot be awakened by nonmagical means before this time expires.
Unlike symbol of death, symbol of sleep has no hit point limit; once triggered, a symbol of sleep simply remains active for 10 minutes per caster level.
Note: Magic traps such as symbol of sleep are hard to detect and disable. A rogue (only) can use the Search skill to find a symbol of sleep and Disable Device to thwart it. The DC in each case is 25 + spell level, or 30 for symbol of sleep.
Material Component: Mercury and phosphorus, plus powdered diamond and opal with a total value of at least 1,000 gp.