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. 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.
Although it is the equivalent of Cleave, Dragon Breath only damages targets in the square directly behind the original target.