Suggest crafting materials!

The last Bloodstained update (see it HERE) showed us how crafting works in the game and it is easy and efficient. You gather up to four different materials / itens / gears, and use them up to create new itens / gears. You can also quickly see some kind of list of materials and what itens and gear they would give. Bloodstained is not finished yet, but it is in the process of it, so, it's probably that suggestions are harder to be accepted now. Even so, i thought it could be fun if we suggest materials for crafting in the game.

These are the materials and itens / gears craftable that was shown in the update:
High Potion: Potion, Melted Skull, Tail, Giant Frog Eye.
High Ether: Ether, Melted Skull, Bat Fangs, Egg.
Lohengrin: Gram, Fire Stone, Steel.
Schedar: Gram, Vepar Fangs, Steel.
Lightning Bolt: Gram, Amethyst Fragment, Steel.
Partisan: Spear, Amethyst Fragment, Steel.
Thorn Whip: Whip, Moco Plant Leaf, bat Fangs.
Armor Piercing: (?)
Brigandine: (?)

Considering all that, let's create materials for crafting. The format should be this:

NAME OF THE MATERIAL: Description.
Usage: In what itens / gear this material should be used to create them. You can made-up such itens and gears.
From: Where this material comes from, in what enemy / enemies. You can use enemies already shown in the game or made up some.
Rarity: how rare or unique do you think the material is (Common, Moderate, Rare or Very Rare).
Everything above, with the exception of the name of the material, is optional. THe rest can be added if you feel like adding it.
You can suggest up to THREE materials (in order to not over pollute your thread and not take other's peoples ideas).

I'm going to do the first ones, as an example.

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BLACK GOO: A piece of black goo from a morte-like enemy.
Usage: Black Potion (increases defense for 30 seconds), Morte Sword (Sword that can summon Mortes).
From: Morte, Morte Cannon, Morte Bone and any morte-like enemy.
Rarity: Moderate.

DARK STEEL: a steel that became darkened, thanks to the contact with darkness itself.
Usage: Kongo (A mythological Spear of Darkness), Whip of Darkness (A Whip with darkness element), Dark Ring (A ring that increases STR and decreases DEF).
From: Dark Knight (A knight in a dark armor), Amy.
Rarity: Rare.

DEMONIC BONE: a bone taken from a demon.
Usage: Beast Axe (An axe made of bones), Bone Armor (an armor made of bones, ultra defense against bone attacks).
From: Morte Bone, Bone-like enemies.
Rarity: Very Rare.

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That's all folks!