Thought Ransom

Linger (Whenever you play an instant or sorcery
spell, you may pay {2} and exile this card from
your graveyard. If you do, add the bracketed
phrase to the triggering spell.)
[Exile the top 8 cards of target opponent's
library.] That opponent may pay {x}{x}. If
they do, they may choose X number of cards
exiled by Thought Ransom to put on the bottom
of their library. Put the rest into their graveyard.