Defiled - The hero knows all Light and Chaos magic and masters it.
Chaos Weapon - The hero possesses the Chaos Power skill (similar to Enchanted Arrow, but only for Chaos magic).
If this is not possible, an alternative option is immunity to fire magic; after an attack, the hero casts a Fireball spell on the same target (a special ability of Daleb, but for the hero's attack, not the ballista).
Mark of Urgash - Immunity to Holy Word. When attacking, the hero applies a fire mark (the skill of the dwarves, which increases damage from fire spells).
Armageddon's Blade - Armageddon deals double damage and only to enemy creatures.
The Shadow of Death - Undead in the hero's army do not die until the total damage inflicted on them exceeds the total health of the unit.
Demon Worshipper - When a friendly unit of creatures dies, it is replaced by a unit of demons of the same level, but in the amount of 50% (rounded down) of the original army. The morale of friendly units does not change from this, and the summoned demons join the hero's army after the battle (similar to the special abilities of Zehir and Naadir, but only for demons. For example, give this to Menelag).
Supreme Mage - Possesses the skills of Arcane Knowledge (center of the wheel of mages) and Lucky Sorcerer (3rd level in luck for necromancers).
Blood of the Clan - Creatures of a friendly faction that are hostile join for money (requires diplomacy).
Master Demonologist - Possesses the artifact Amulet of Mastery. Opening a gate summons a unit of demons equal in number to the unit that opened the gate (100% of the original unit).
Guardian of Harmony - The luck and morale of friendly creatures cannot fall below 1, and the luck of enemy creatures cannot rise above -1 (ignores true luck, lucky sorcerer, etc.).
Child of Malassa - When using dark magic, applies Subjugation to the weakest enemy creature.