Inaccurate?

Overwhelming Revelations

(Magic of Eberron, p. 100)

Evocation
Level: Sorcerer 6, Wizard 6,
Components: V, S, M,
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Area: 20-ft.-radius burst
Duration: Instantaneous
Saving Throw: Will partial
Spell Resistance: Yes

You tap the incredible complexity of the draconic Prophecy, granting creatures in the area a burst of insight powerful enough to threaten their sanity. Creatures in the area take a -2d6 penalty to Wisdom and are confused for 1 round. A successful Will save reduces the penalty by half and negates the confusion.

Special: Characters with the Dragon Prophesier feat (see page 46) have immunity to the effect of this spell. Furthermore, if within the area of the spell, such a character can choose to enter prophetic favor as an immediate action. This counts as one of the character's daily uses of prophetic favor.

Characters with a dragonmark take a -2 penalty on their saving throw against this spell.

Material Component: A scale from an adult or older dragon.