There are currently ten known Power Sigils, each used to tap into a unique aspect of the realm's energy through dice-like Di-Gata Stones.
Sigils are symbols that represent the primordial energy that is in the ground in RaDos. When it was discovered, the stone carvers and the Wizards set about creating the sigils which would be capable of summoning this energy. The sigils are RaDosian-made that represent, transmute and control the latent power in the environment of RaDos.
To study the Sigils one must first realize that no sigil is evil and no sigil is good. The sigils transcend these moralistic notions, they represent parts of the whole and could never exist without their opposites. It is through the combination of Sigils that one creates true power, this is why pupils focus their study on two sigils, a single sigil is of limited value and power on its own.
Individually, each Sigil is capable of unleashing a burst of raw energy, but when used in combination with each other, the energy aspects blend together to form a Henge. Not only does this create a far greater concentration of power, it also allows access to other kinds of destructive or helpful powers.
For casting stones, there is a base energy but it is unusable unless it is funneled through the constructs of the sigils. The sigils are elemental in nature, and the types of attacks depend a lot on how the caster manipulates the sigil energy.
The off sigil, or miscast sigil, is designed into the stone to be a ground for the sigil energy. This mean it's impossible to have a castable Pure Stone as they are all one sigil energy. Stone casters who have mastered their stones rarely have this grounding sigil turn up.