Dragon Breath is a basic Magic ability. When activated the player hits all targets within a frontal cone for up to 188% of active spell damage. Unlike Tsunami, this frontal cone only encompasses the three adjacent and diagonal spaces directly in front of the player. It does not hit opponents behind the target which the animation might suggest. The damage is not affected by a target's use of a dragonfire protection.
Cleave is the Strength equivalent of Dragon Breath. However, Cleave hits for 125% weapon damage instead.
Strangely, in PvP Dragonbreath can be used at a distance and generates adrenaline but does no damage. Against NPCs, Dragonbreath can only be used adjacent to the target.
There seems to be a graphical glitch depending on it's hit. If it hits the target, no animation will be shown, and vice versa if it does not hit.
Dragon Breath used to hit 300% active spell damage before a hidden update that severely weakened most abilities.