Activation base is in stamina and values vary with fatigue%.
Cleanse Area will remove all spell-related buffs and debuffs, as well as all glyphs except forGlyphs of Neutralization, within its area of effect. However, the ability will have no effect on the templar casting it.
This talent is only useful during a very limited number of mage-dominated fights in the game. However, it can make those fights really easy. It is at its most powerful in the final fight of the Nature of the Beast questline, provided one sides with werewolves against Zathrian: Cleanse Area will remove the paralysis from Witherfang and the werewolves, and this otherwise challenging battle will be over in a matter of seconds.