Heroes of Might & Magic III: Horn of the Abyss

But I still think that there won't be a Super Artifact that gives absolutely everything in the add-on :).

Hmm... Then how about creating a Devilish Set? (A composite Artifact).
Which would consist of:
Amulet of the Devil
Sword of Satan
Armor of Hell
Shield of the King of the Damned
Something like that :)

The guys must have had some serious problems, otherwise the Professor wouldn't have posted anything. And they are working on their own, no one is paying them, they may not post anything at all!
It seems I already wrote something about the Amulet of the Devil and the Sword of Satan... but here is the ideal version of the entire composite artifact.
In general:
Amulet of the Devil - 50% damage from fire magic. Immunity to Blindness and Berserk.
Sword of Satan - +6 to attack. On hit, creatures inflict "Curse" on the enemy.
Armor of Hell - Expert Fire Magic. +2 to spell power. +2 to Knowledge.
Shield of the King of the Damned - +6 to defense. 60% resistance to Armageddon.
Together they form Satan's Armament - what does it give if you assemble it - Immunity to fire magic. +6 to attack. +6 to defense. Expert Fire Magic. +2 to Knowledge. +2 to Power. On hit, inflicts "Curse".
Here is one of the ideas :)