Adrenaline
From Guild Wars Wiki
Adrenaline is a resource that some Warrior, Paragon, and a few PvE skills require as a cost instead of energy. It is represented with the icon
in skill listings.
[edit] Gaining Adrenaline
You gain one "strike" of adrenaline every time you hit an opponent with a weapon (attack skills which attack multiple opponents will grant one strike for each opponent). You also gain a small amount of adrenaline whenever you take damage. Some skills, such as "To The Limit!", can be used to gain adrenaline as well. Other skills can affect the rate at which you gain adrenaline, such as Infuriating Heat and Soothing.
Testing indicates that adrenaline is actually measured in units smaller than strikes. Each successful attack provides 25 units of adrenaline, and each "strike" in a skill cost represents either 20 or 25 units of adrenaline. In comparison, losing 1% of your health due to damage (not degeneration) will provide one unit of adrenaline.
Adrenaline gain multipliers are capped at 200%.
[edit] Using Adrenaline
When your adrenaline is empty, adrenal skills will have dark icons in the skill bar. As you gain adrenaline, these icons become brighter and a flame creeps up them. When the flame effect vanishes and the skills are fully bright, they can be used. (Note: Some unofficial user mods will alter how adrenaline levels appear.) When you activate an adrenal skill, the adrenaline charged up for that skill is reset to zero. All of your other skills lose one strike (25 units) of adrenaline. However, if the skill was an attack skill and that attack hits, that hit will in most cases reclaim the lost adrenaline. Some attack skills, like Dragon Slash will even regain extra adrenaline if they hit.
All of your adrenaline will naturally be lost after 25 seconds of not attacking, not sustaining damage, or otherwise gaining adrenaline (such as by using Rage of the Ntouka). You will be warned if you have partially filled adrenal skills as they will begin blinking. Some skills such as Wild Blow and Sympathetic Visage also cause adrenaline loss. Disabled skills also lose all their adrenaline, and disabled and recharging skills cannot gain adrenaline.
