From Guild Wars 2 Wiki
— In-game description [?]
Available to any character of any race or profession:
- 25 (from the skill tab in the hero panel, at any time) or
- Healing Tome: Antitoxin Spray
(This item costs 5 + 250 Pristine Toxic Spore Sample; it was available from Marjory Delaqua during Tower of Nightmares after giving her 50 of the samples)
- This skill cannot be used in structured PvP.