Caravanners Trading Post

{3}, {t}: Create a 0/2 green and white Ox
creature token with "{t}: Gain 1 life."
Pay 2 life, discard a card: Flip a coin.
If it's heads, draw two cards.
Sacrifice Caravanners Trading Post: Prevent
all damage dealt to target creature until end
of turn, tap it and it doesn't untap during
its controllers next untap step.