Shapeshift

(Start the game with this in the command zone, you may activate this card's abilities from the command zone at any time you could cast a sorcery and only once each turn.)
{1}{g}: You become a 1/1 creature until end of turn. (You may attack and block as if you were a creature with base power and toughness 1/1 until end of turn. If damage would be dealt to you while you are a creature, prevent that damage and you lose that much life. If you would leave the battlefield while you are a