Madman's Knowledge

You may discard a card. If you do, draw a card.
Madness {p/b} (If you discard this card, discard it into
exile. When you do, cast it for its madness cost or put
it into your graveyard.)
Cycling {2}
"Making contact with eldritch wisdom is a blessing,
for even if it drives one mad, it allows one to serve a
grander purpose, for posterity."