Pantheons Of the Riordanverse

Mythical building materials

Greek: Celestial bronze

Roman: Imperial gold

Norse :Bone steele

Celtic: Cold iron

Magical metal native to the Celtic pantheon. Cold iron is mined from rolling hills and near sources of water like lakes or capes.

It is able to effect & harm Celtic monsters, formorians, fairies.

Weapons & tools are made of cold iron are used by Celtic demigods, legacies, druids,fairies.

Weapons made from cold iron are very effective against ghost and the undead.

Aztec: Mitclan Obsidian

Magical material native to the Aztec pantheon. Mitclan obsidian is created from the lava flows originating from Mitclan itself(Hence the name). Magic Magma which flows from Mitclan to the world we live on.

The magma since magical in nature, it takes longer to cool than earthly magma. But to drastically increase the cooling process requires to use clear spring water. When it cooled , to be craft into into anything useful requires to craftsman to carefully chip it into the shape needed.

Tools made from Mitclan Obsidian, are used by Aztec Warriors.

Weapons & tools made from Mitclan Obsidian have been shown to be highly resistant to heat.

Polynesian: Mana wood

Magical wood, grown from magically enhanced koa trees. Mana wood is grown from Koa trees/seeds with most either blessed by Lono or grown & cultivated by his demigod children.

Wild mana wood trees do exist, but are rare. Mana koa trees are either grown in enchanted orchards, or found in secluded groves or lagoons.

Mana woods is far more durable that most other woods to a supernatural level. Weapons made from mana wood is able to affect & harm monsters. Mana wood items can channel the user own life force, enhancing their attacks.

Tools & weapons made from mana wood, are used by Polynesian demigods.

slavic: Ash steele

Forge metal of the Slavic pantheon, is create through a very specialized forging process.

Ash Steele is created by first soaking wood in the blood of an monster or something supernatural. The wood is then dried with it still coated in blood. Then I'd burned until it is just ash, that ash is then added to molten metal while it's forging.

Once the metal is cooled & formed, it has become ash steel. Ash Steele is especially especially effective against what ever blood was used in the forging process.  Armor made from ash Steele has higher resistance to whatever the blood sources came from.

Weapons/tools made of ash Steele are used by Slavic Demigods.