Aevyenkai is one of the Six Elemental Crystals and influences the Air and Winds.
The Crystal of Light is the most potent of the Elemental Crystals. While possessing the power to do good, in the wrong hands the opposite could be true.
The Elemental Crystal of Erdé, the influencing gem of the land and stone.
A vicious weapon of torture and death, or a way to bring a fight to an end by disabling your foe? This is the Rzarchprl of the Kyadii.
Fyrkai - the Crystal of Fire or Flame is one of the Six Elemental Crystals used by the Crystal Circle.