What is your favorite ultimate ability for that class?

I voted for "Arcane Mastery" because I remember playing as Zephyr in the final mission of Warlords of the Wastelands. It's true that developing a hero to have super abilities is difficult if there isn't a mentor nearby. But many of them are worth it. I absolutely disagree with Vampire Lord because many of the skills required to develop super abilities are incredibly useful! Here's how I rate the super abilities: 1. Arcane Mastery (Subjugation, Berserk for a mage, Meteor Shower against neutral creatures, many other spells. Required for development: Counterspell (against Sorcerers, Necromancers, and other Mages), Mentor, Machine Mastery). 2. Pure Rage (Blood Fury points reduce damage, Battle Frenzy: additional points, immediately second level of Blood Fury: for warlords, this is Cleave). 3. Absolute Defense (I think it's important to preserve the army, which is why weakening the enemy by half is useful). 4. True Luck (Twice as strong attack... But your army can also be attacked in the same way. Of course, it's very useful against neutral creatures and weak heroes). 5. Call of Urgash (Useful for blocking ranged units, but very often, with the right positioning, ranged units are protected from all sides by melee troops. Useful against neutral creatures and armies with many ranged units). 6. Elemental Fury (not very useful for a Sorcerer, because the most useful thing for him is Enhanced Meteor Shower). 7. Banshee's Wail (-5 to Morale. Even with such morale, troops can still move. And if the enemy hero has Skilled Leadership and a set of "Lionheart" artifacts? It's also useless against a strong mage who will defeat all troops with spells). 8. Relentless Force (Beautiful name, no effect).