Twisting Nether

Brief History
Found buried deep within the underdark of Kaomora this artifact of rare and immense power allows those gifted in the arcane to draw even greater power to their cause... But at what cost?

What can it do
Acts as a focusing beacon to build greater arcane power, in the hands of a gifted practitioner it could allow it's users to extend spell usage beyond the normal bounds of magic

What does it look like
A pulsing crystal, purple in colour with tiny fractures within it.