From Guild Wars 2 Wiki
— In-game description [?]
- Hidden Flask — Drink a Lesser Elixir B when struck while below the health threshold.
- HGH — Elixirs grant might, have reduced recharge, and have increased duration.
For a detailed skill history, see here.
|September 22, 2017|| Path of Fire release:
|November 15, 2012||
|August 28, 2012|| Game release:
- The 'B' likely represents boon or Boost.