Ghost Harvest

Sacrifice a creature. Target opponent loses
1 life unless that player sacrifices a permanent
or discards a card. If the creature was a white
Spirit or a Spirit token, you gain 1 life. You
may repeat this process any number of times.
At the end of the turn, create a 1/1 black white
Spirit token with Flying for each non-token
creature sacrificed this way.
"A time to save. A time to collect."