Crawdad, Fen Cully

Swampwalk, maunder (when this creature attacks
and is not blocked, you may draw a card. If you do,
all damage dealt by this creature is prevented until
end of turn.)
When Crawdad, Fen Cully enters the battlefield,
if both blue and black mana were used to cast it, exchange control of two target permanents with
the same mana value.
"The Fenland welcomes you, traveler."