Papreaper

Papreaper is a herb used in the Dungeoneering poltergeist puzzle. It is one of the dangerous herbs. It can be consecrated using a certain Herblore level to make a consecrated herb.

If it is not the appropriate herb for the puzzle and you try to pick it, you get injured for a small amount of damage as "You feel your life force ebb away from you and into the plant."

Trivia

 * Papreaper's name is a pun on the real-world spice.