Dark Barrier

Dark Elves are known for their thirst for natural magic forces. Having stored knowledge for ages, they have acquired a 'sixth sense' for battle and tactics.

Their unique racial ability provides Dark Elves with additional defense that can be calculated as:

(Spell power + Knowledge) * (10+(Faction Skills Level of a hero)) / 100

Example: your Dark Elf has reached 10th faction skill level, and yours stats are 15 Spell Power and 15 Knowledge. All creatures in your army will gain 30 * (10 + 10) / 100 = 30 * 1/5 = +6 Defense.

Note that this special ability is nearly useless for Dark Elves playing as pure Might characters, whose magic stats typically include 0 Spell Power and 1 Knowledge. It is, however, quite useful for Magic Dark Elves who assign most of their stats into Spell Power and Knowledge.