Ratticus, the Meek

Flying, haste
When Ratticus, the Meek enters the battlefield,
you may draw a card. If you do, discard a card.
{1}, {t}: Create a 1/1 black rat creature.
Tap three untapped rat creatures you control.
Create a 2/2 red Dragon creature with flying
and "{r}: This creature gets +1/+0 until
end of turn"