Abigail, Glorious Apostle

When Abigail enters the battlefield and at the
beginning of your upkeep, gain 3 life and add an
Aum counter to Abigail if she does not have one.
Remove an Aum counter from Abigail: put target
creature card from your graveyard onto the
battlefield under your control.
If Abigail would die, instead flip a coin: if the result
is heads, Abigail gains indestructible under end of
turn. If the result is tails, destroy Abigail.