Fire Fource is a recurring skill in the Dragon Quest series.
Fire Fource is learned by placing 4 skill points in the Fource skill tree. It empowers a single ally with fire, causing their physical attacks to do much more damage to enemies that are weak to fire, and giving them some resistance against fire attacks for several turns. If the user holds an Armamentalist's Album, the effects are automatically applied to the entire party.
Fire Fource mostly acts the same as in IX, but now only causes allies's physical attacks to do more damage without resistance to fire attacks. It costs 2 MP to use, while Wickermen, Mandrake marshals, and Charmours use this skill against players.