uncommon plant transmutation 

Traditions primal

Cast [>>] somatic, verbal

Duration 1 minute

Thorns sprout from your body; they pass through and don't damage any clothing or armor you wear. Adjacent creatures that hit you with a melee or unarmed attack take 1d4 piercing damage as the nettles jab them and break off. Each time a creature takes damage in this way, nettleskin's duration decreases by 1 round.

Heightened (+1) The damage increases by 1d4.

Threshold of Knowledge, page 10.