詭計／Ruse：The “ruse” descriptor applies to spells that appear to be other, usually more harmless spells in order for the caster to fool her opponents. Spells with the ruse descriptor are easily mistaken for other spells and are intended to confuse even onlookers trained in Spellcraft or Knowledge (arcana). Attempts to identify a ruse spell by its effects, its aura, its components, or other attributes with a skill check treat the spell as though it were a different spell, as indicated in the spell’s description. The one attempting the check can correctly identify the spell only by exceeding the DC by 10. The false spell is typically a level lower than the ruse spell, so skill checks use the DC for the lower-level spell. Even detect magic and most similar spells don’t prevent the caster from being fooled by a ruse spell. Analyze dweomer, greater arcane sight, and similar spells of the same or higher spell level that automatically identify spells reveal a ruse spell for what it is. Ruse spells that mimic harmless spells still list harmless on their saving throw or spell resistance lines; a creature that knows or suspects the true nature of the spell typically chooses to attempt the save.