Omnimagic

Omnimagic is a rare magical ability that Khyonessa Nevula has. It is the ability to copy any spell, including Dark Magical curses.

It is notable that copying dark magic has negative effects on Khyonessa, including magibyrning.

Trivia

 * "Omni-magic" comes from the prefix omni-, which comes from Latin omnis meaning all, and magic.