Zop, the Loremonger

When Zop enters the battlefield, you may exile the top 2 cards of your library face
down. Whenever Zop deals combat damage
to an opponent, you may reveal one of the exiled cards at random. If it's a nonland
card, you may cast it without paying it's
mana cost.
Zop is unblockable while defending player controls more lands than you.