Pteryx, White God of Liberty

Ward—Sacrifice a legendary permanent.
As long as your devotion to white and blue is
less than seven, Pteryx isn't a creature.
Creatures you control have flying, ward {2}, and
"{2}{t}: Draw a card."
Whenever Pteryx becomes tapped, create X 1/1
white Bird creature tokens with flying, where X
is your devotion to white and blue.