What are the abilities of Trading Post?
user
{1}, {T}, Discard a card: You gain 4 life.\n{1}, {T}, Pay 1 life: Create a 0/1 white Goat creature token.\n{1}, {T}, Sacrifice a creature: Return target artifact card from your graveyard to your hand.\n{1}, {T}, Sacrifice an artifact: Draw a card.
assistant