Spit poisonous thorns which are lethal unless healed in time
Thorn Spitting is the ability to spit black thorns from one's mouth in rapid succession. The first symptoms of this toxin are light headedness and dizziness, followed by a coma that will eventually kill the victim unless healed in time.
The only known user of this power was a Thorn Demon.
Piper was hit with a thorn when she and Paige fought a group of Thorn Demons. She initially felt fine, though she eventually became dizzy and light headed before falling into a coma. She was later healed by Wyatt, though she remained in a coma and nearly died until Leo returned to her.