Posts from Here’s what makes the Elves stand out in Heroes 5.

Elven heroes can instill a thirst for revenge in their warriors – their creatures will be more effective in attacking a specific enemy.
At the beginning, there is at least one enemy creature against which the elven hero's army will be most effective. A special building, the Avenger's Guild, in elven cities, depending on the development of this skill, will allow training elven warriors against several specific creatures – up to 4, depending on the skill level. The elven army deals more damage to enemy creatures that are on the Conquered Enemies list. Some other special skills of Elven heroes are also enhanced if their target is a creature from the Conquered Enemies list.