Inaccurate?

Urchin's Spines

(Stormwrack)

Transmutation
Level: Ranger 1, Druid 2, Sorcerer 2, Wizard 2,
Components: V, S, M, DF,
Casting Time: 1 standard action
Range: Touch
Target: Creature touched
Duration: 1 min./level
Saving Throw: Will negates; see text (harmless)
Spell Resistance: Yes (harmless)

The transmuted creature's skin (including clothing and armor) is covered by 2-inch spines.
An opponent who grapples the subject or strikes it with a natural weapon takes 1d3 points of piercing damage from the spines, which also inject a mildly irritating poison.
The opponent must make a DC 13 Fortitude save or take initial and secondary damage of 1d2 Dexterity.
Arcane Material Component: A spine from a sea urchin.