Mithril Mail
Mithril Mail is a magical artifact, only available from a special quest where you must clear out 4 Dwarven Mines to make them habitable for their previous owners.
Any hero wearing Mithril Mail, will take significantly less damage from physical attacks in combat.

Stormblade
Stormblades are rare magical items, created by the Elves to aid in fighting Giants, Minotaurs and Trolls. Any hero who wields a Stormblade will do a lot of extra damage to these creatures every time he hits them.

Ring of Doom
This ring is an ancient magical artifact, only available by completing the Quest of the Mad Daemon.
Any hero wearing the Ring of Doom has a good chance of chasing an individual enemy creature from combat and leaving him terrified - unable to fight properly for a number of turns.

Mace of Crushing
Maces of Crushing are common but nevertheless powerful magical items. Any hero wielding such a weapon, has a small chance of inflicting a "Crushing Blow" that reduces an enemy's life points by 50%.