Backfire

Hex Spell. For 10 seconds, whenever target foe casts a spell, that foe takes 35...119...140 damage.

Hex Spell. (10 seconds.) Target foe takes 35...119...140 damage whenever it casts a spell.

Progression
Domination Magic Damage	0 35 1 42 2 49 3 56 4 63 5 70 6 77 7 84 8 91 9 98 10 105 11 112 12 119 13 126 14 133 15 140 16 147 17 154 18 161 19 168 20 175 21 182

Acquisition

Wastrel's Worry and Demise can be used as cover hexes and to pressure the target to act prematurely.
The damage is triggered by successful activation of a spell, but it is applied before the spell takes effect. Accordingly, targets will take damage if they use a spell to remove Backfire; they can also die by casting a healing spell.
Similar to Chaos Storm, the AI in normal mode will only use this skill on a foe wielding a staff or wand, even if the potential target is a spellcaster-primary profession foe with 8 spells on their skill bar. ^{[verification requested]}

The figure in this skill icon is also used in the skill icon for Desperation Blow.