Residuum

Residuum is a strange crystal that radiates magical power. It can take on many different forms, such as green polygonal crystals or large purple spheres, but when ground up, it always turns into a rainbow colored dust. Residuum can act as a spellcasting focus, an amplifier rituals, or a material component to costly spells.
First, any class can use whole Residuum crystals as a spellcasting focus. Each crystal has a number of charges determined by its size. When used in this way, a spellcaster can expend a single charge to upcast a spell one level higher than the spell-slot they used (i.e. expending one charge and a third level spell-slot produces a fourth-level spell). The crystal then shrinks; when the last charge is expended, that piece of residuum vanishes forever. Spells cannot exceed 9th level using this method.
Second, ground Residuum dust can be used as a replacement for material components. One ounce (28 grams) of dust can be produced per charge from a whole residuum crystal, and each ounce can replace up to 100 GP worth of material components. Even if the spell does not normally consume its material components, the residuum is consumed.
Finally, any character that can cast spells as rituals can also use residuum to radically amplify a ritual's effects. When done this way, a ritual produces a bigger effect depending on how much residuum is used; how the ritual changes is up to the DM's discretion, but bigger effects should require exponentially more residuum.

Manufacturing process

Residuum forms naturally in the ground in response to change and transition, particularly in response to Transmutation and Necromancy magics and ritualized death practices. Khekhesheh is particularly known for possessing very large veins of Residuum that can be easily mined.

Item type

Consumable, Magical

Current Location

Kekhesheh

Raw materials & Components

Residuum is the main ingredient in the drug known as Suude.