Thought Sacrifice

As an additional cost, exile the top X cards from
the top of your library on a face down pile, where
X is the converted mana cost of target spell. If X
was on its cost, exile the converted mana cost
plus the cost of X that was paid instead.
Counter target spell. put the top card of that
pile into your hand and the rest into your
graveyard.
"Surviving Nicol Bolas Hailfire required sacrifice."