Interference
Interference is a secondary skill that lowers the power of the enemy hero. Clerics, Druids, Elementalists, Heretics, Necromancers, Warlocks, Witches and Wizards cannot learn Interference. Out of magic hero classes, only Battle Mages and Navigators can learn it, but the probability of learning it is still very low.
Heroes with Resistance as a starting skill:
Ajit the Overlord - Basic Interference
Bron the Beastmaster - Basic Interference
Clancy the Ranger - Basic Interference
Fafner the Alchemist - Basic Interference
Giselle the Ranger - Advanced Interference
Ignatius the Demoniac - Basic Interference
Krellion the Barbarian - Basic Interference
Saurug the Battle Mage - Basic Interference
Straker the Death Knight - Basic Interference
Ufretin the Ranger - Basic Interference
Zilare the Navigator - Basic Interference
Heroes with an Interference specialty:
The following heroes receive a 5% per level bonus to their Interference skill.