Runes of Wizardry is all about placing patterns of Arcane Dust to create Runes with various effects.

It intends to be a full reimplementation of the old Runic Dusts mod.

Unfortunately, I do not currently have the time or energy to keep updating this mod, but forks are welcome. I apologize for the inconvenience.

Note: as of version 1.12.2-0.9.0, the Runic Staff has been removed. Any dust can be used in its place in crafting recipes, and Runes are activated by sneak+right-click with an empty hand.

There are two options to get ingame documentation:

with Guide-API installed, the Runic Dictionary works as any guidebook (v1.12.2-0.8.7 and up).
The Runic Dictionary (Enhanced Edition) has the description and cost of runes in the tooltip (hold shift). It can also be used to automatically place runes.
A few of the items also have JEI descriptions if their use/obtainability is not obvious.

Runes and dusts are provided in separate downloads, without an addon, this is decorative only. For a reimplementation of the Runic Dusts Mod runes, see the Classic Dusts Pack

On its own, this mod adds the following:

Dusts: They can be placed on the ground in a 4x4 pattern on each block. remove with left click or right click with an empty hand
5 types of arcane dust: plant, water, fire, glowstone, and ender
Chalk dust: a cheaper, decorative dust that can usually not be used in runes
Arcane Dye: A block that allows to change the color of chalk dust.
- Colors are specified in hexadecimal (0-F) RRGGBB (red green blue) format
- There are presets for vanilla colors
- automatable: will set the color of its contents on a falling redstone pulse
Dust Pouches: hold a near-infinite amount of a single type of dust
Dust Broom: clear a full block of dust in one click
The base framework for addons to create Runes and Inscriptions
Runes are special patterns that can be activated for an effect
Runes are documented and can be placed with the Runic Dictionary
(left/right-click to select a rune, shift-right-click to place it, tooltip has documentation)
Runes are activated by dropping the proper items as sacrifice and right-clicking with ~~the Runic Staff~~ an empty hand while sneaking
Inscriptions are worn in either the chestplate or Baubles amulet slot and can have different effects
Inscriptions are (temporarily) created with special runes (Inscribing Rune of XX) and "charged" by the Inscription Enchanting Rune (with the proper sacrifice)
the "rw_export [filename]" command will save the pattern you are looking at to a JSON file in the runesofwizardry_patterns folder
the "rw_import [filename | runeID]" command will load a pattern from a file in the runesofwizardry_patterns folder (or from a registered rune) and place it where you are looking

For documentation: use JEI for recipes as well as some extra information; The tooltips of inscriptions and of the Runic Dictionary should provide more information.

Links:

Minecraft Forums Thread

Old forum Thread

Runic Dusts forum Thread

Credits:

zombiepig333/lightningpig333 - Project founder
billythegoat101 - Original author of The Runic Dust Mod