Sworn enemy.

It seems that a Ranger can instill a special hatred in their troops towards certain creatures, allowing them to attack with double or triple the strength (to choose a sworn enemy, you need to build a Guild of Avengers, have the "Avenger" skill, and, for example, to make a Lich a sworn enemy, you need to have encountered them at least once). A "Rain of Arrows" and "Enchanted Arrow" ability can appear in the spellbook. If you use "Rain of Arrows," the arrows fly at all sworn enemies at once (with increased strength, I think). Correct me if anything is wrong...