Intellectual Property Theft

Exile the top X cards of target opponent's
library. Until end of your next turn, you may
cast up to one enchantment, instant or sorcery
card exiled this way, and you may spend mana
as though it were mana of any color to cast it.
"Hey! These are my words!"
—Viven Reid, upon finding the words of her
unfinished memoirs were being stolen.