Tome of Maddening Knowledge

Equipped creature gets +1/+1 and whenever it
deals combat damage to a player you may exile
a card from a graveyard and surveil X, where X
is cmc of cards exiled this way.
Equip {b}
"The more I read the less I understand, but I can't
stop myself. I can't sleep until I know... who or what
is Azathoth?"
—Blackwell