Poppy, Sheltered Youth

Whenever you cast a spell, you gain 1 life.
Pay 5 life, {t}: Add {w}{w}, {b}{b}, or {w}{b} in any combination.
At the beginning of your upkeep, if your life total
is equal to or less than half your starting life total,
transform Poppy, Sheltered Youth. Otherwise,
draw a card.