Granik's Ride

When Granik's Ride deals combat damage to a
player, shuffle target creature that crewed it into
its owner's library, then discover X, where X is its
mana value. (Exile cards from the top of you library
until you exile a nonland card with mana value X
or less. Cast it without paying its mana cost or put
it into your hand. Put the rest on the bottom in a
random order.)

Crew 1