The Riddler

Whenever an opponent attacks you, look at the
top card of your library. That player guesses
whether it's a land, non-land permanent, or a
non-permanent. If they guess incorrectly, prevent
all damage done to you and permanents you
control this combat. Then, you may cast that
card without paying its mana cost.
"That is because you are no match for me, Edward
Nigma, the Riddler, and your intellectual superior."