Death by Thorns

As an additional cost to cast this spell, reveal two
cards in your hand. Send one of these cards to the
graveyard and exile the other.
Destroy target creature or planeswalker.
"The spell took its toll on my body. I could feel its dark magics liquefying areas of my brain, my cognitive capabilities irrevocably damaged. Then, I looked at the writhing Great Wyrm at my feet and knew it was
worth it." -From the journal of Dis'ruvaleth Palondal