School enchantment (complusion) [mind-affecting]
Casting Time 30 minutes
Components V, S, M (mercury and phosphorus, plus powdered diamond and opal)
Effect 60-ft. area rune within 100-ft. of ritual node
Saving Throw will negates; Spell Resistance no
When this ritual node is created, you scribe a powerful rune within 100-ft. of it. When you scribe the rune, you specify a trigger of any complexity that can affect creatures within 60-ft. of the rune. Until the rune is triggered, it is considered inactive. Once the rune is triggered, it lasts for [20/30/40/50/60] minutes and then disappears for the rest of the day. It resets the next day. Each day, you may change the rune's position and/or triggers
When triggered, creatures in the area fall into a catatonic slumber for [1/2/3/4/5] hours. Unlike with the sleep spell, sleeping creatures cannot be awakened by non-magical means before this time expires. This spell is purely for stalling intruders. When any danger to the sleeping creatures approaches, they wake up.
Read magic allows you to identify a symbol with a Spellcraft check (DC 15). Of course, if the symbol is set to be triggered by reading it, this will trigger the symbol.
A symbol of sleep can be removed by a successful dispel magic targeted solely on the rune. An erase spell has no effect on a symbol of sleep. Destruction of the surface where a symbol of sleep is inscribed destroys the symbol but also triggers it.