Inaccurate?

Ignite Dragonmark

(Dragonmarked, p. 152)

Transmutation [Fire]
Level: Artificer 2, Cleric 2, Druid 2, Sorcerer 2, Wizard 2,
Components: V, S, Dragonmark
Casting Time: 1 standard action
Range: Medium (100 ft. + 10 ft./level)
Target: One dragonmarked creature
Duration: Instantaneous
Saving Throw: Will half; see text
Spell Resistance: Yes

With a soft utterance and a sharp thrust of your hand, you cause the target's dragonmark to burst into flame.

The target's dragonmark ignites momentarily, dealing it 1d6 points of fire damage per caster level (maximum 5d6). In addition, the target cannot use any of its dragonmark powers for 1 round per 5 points of damage taken (rounded down).

Dragonmark: Any true or aberrant dragonmark.