ToE HoF H5

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Artifacts
Name Slot » Type « Cost Source
Amulet of Necromancy Amulet of Necromancy Neck Relic 7000 H5
Necromancy skill +10%
Armor of the Forgotten Hero Armor of the Forgotten Hero Chest Relic 28000 H5
Adds +2 to hero's primary stats and grants 20% magic resistance to hero's army.
Boots Of Levitation Boots Of Levitation Feet Relic 20000 H5
Hero can move over the sea
Cloak of Death's Shadow Cloak of Death's Shadow Shoulders Relic 13000 H5
Decreases morale and luck of enemy creatures by -2.
Crown of Sar-Issus Crown of Sar-Issus Head Relic 15000 H5
Adds +6 to hero's knowledge.
Cuirass of the Dwarven Kings Cuirass of the Dwarven Kings Chest Relic 17500 H5
Adds +4 to hero's defense and renders all creatures in hero's army immune to Implosion spell.
Greaves of the Dwarven Kings Greaves of the Dwarven Kings Feet Relic 17000 H5
Adds +4 to hero's attack and renders all creatures in hero's army immune to Slow spell.
Helm of the Dwarven Kings Helm of the Dwarven Kings Head Relic 17000 H5
Adds +4 to hero's knowledge and renders all creatures in hero's army immune to Blind spell.
Lion Crown Lion Crown Head Relic 12000 H5
Increases hero's morale and luck by +2.
Pendant of Conflux Pendant of Conflux Neck Relic 15000 H5
Hero gains 1 mana point for every 2 mana points spent by enemy hero
Pendant of Mastery Pendant of Mastery Neck Relic 20000 H5
Grants hero a free level of his or her primary skill. This level is gained even if the hero's skill is on Expert level.
Ring of Sar-Issus Ring of Sar-Issus Finger Relic 20000 H5
Reduces the mana cost of all hero's spells by half.
Ring of Speed Ring of Speed Finger Relic 17000 H5
Increases initiative of all your creatures by 20%.
Robe of Sar-Issus Robe of Sar-Issus Chest Relic 15000 H5
Adds +6 to hero's Spellpower.
Sandals of the Blessed Sandals of the Blessed Feet Relic 16000 H5
Increases all hero stats by +1
Sandro's Cloak Sandro's Cloak Shoulders Relic 20000 H5
Negates enemy Mind Affect immunity
Shackles of the Last Man Shackles of the Last Man Pocket Relic 40000 H5
Prevents you and all your foes from retreating from combat.
Shield of the Dwarven Kings Shield of the Dwarven Kings Shield Relic 17000 H5
Adds +4 to hero's defense and renders all creatures in hero's army immune to Frenzy spell.
Skull of Markal Skull of Markal Pocket Relic 22000 HoF
Increases hero's Spellpower and knowledge by +5, but decreases Morale by -2.
Staff of Sar-Issus Staff of Sar-Issus Weapon Relic 20000 H5
Negates enemy magic resistance. Magic protection and immunities, if any, are not affected and still remain.
Staff of the Netherworld Staff of the Netherworld Weapon Relic 17000 H5
Decreases initiative of enemy creatures by 20%.
Tome of Dark Magic Tome of Dark Magic Shield Relic 20000 HoF
Allows all Dark Magic spells to be cast without any skill in this school.
Tome of Destruction Tome of Destruction Shield Relic 20000 HoF
Allows all Destruction Magic spells to be cast without any skill in this school.
Tome of Light Magic Tome of Light Magic Shield Relic 20000 HoF
Allows all Light Magic spells to be cast without any skill in this school.
Tome of Summoning Magic Tome of Summoning Magic Shield Relic 20000 HoF
Allows Summoning Magic spells to be cast without any skill in this school.
This information comes from the Heroes V release version (v2.1).

Thanks to sfidanza for creating the Heroes 5 artifacts page!
Thanks to ThE_HyDrA for creating and looking after the Heroes 5 section of Age of Heroes!