Vigilance (Attacking doesn't cause this creature to tap.), reach (This creature can block creatures with flying.)
Lumra, Bellow of the Woods's power and toughness are each equal to the number of lands you control.
When Lumra enters, mill (To mill a card, a player puts the top card of their library into their graveyard.) four cards. Then return all land cards from your graveyard to the battlefield tapped.