From The Heroes of Might and Magic III wiki

Artifacts equipped in this slot oftenmost gives bonuses to Attack. The list of these are:

• Centaur's Axe
• Blackshard of the Dead Knight
• Greater Gnoll's Flail
• Ogre's Club of Havoc
• Sword of Hellfire
• Red Dragon Flame Tongue
• Sword of Judgement
• Titan's Gladius
• Armageddon's Blade Note: Is only in the Armageddon's Blade expansion.
• Angelic Alliance Note: Is only in the Shadow of Death expansion.
• Titan's Thunder Note: Is only in the Shadow of Death expansion.