The Nine Shards.
You will learn their names quickly, so I don't mind sharing that, everything else must be learned during the quest.
Lumabella, the Talisman of Light
Mortimo, The Hand of Grim Mistakes.
Tectaniteus, The Titan's Skin.
Seeker, Book of Maddening Waves.
Pyron, The Flames of Passion
Aelia, The Warhorn of the Past Ages
Bartimus, Apple of the World
Draven, The heart of Darkness
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Now please note one thing, in Graterras there has never ever been an Artifact that is a straight up Weapon ((there are magic weapons, but they are not nearly as special as artifacts.). Aritfacts are always something that it itself cannot be used to kill, it powers might be able to, but the object itself cannot. ((Like the Flames of Passion, are Petrified Flames they aren't burning anybody.)). This is an important piece of Graterras. Beacues in the World of Graterras, it matters not if you can swing a weapon or sling powerful spells. Other things dictate who lives, and who dies. This world is more than just dumbly striking your foes down where they stand, that won't work, unless you are seeking a swift death, you will win that quickly. Godspeed friends, you are going to need it from here on out.