(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
,
For each player, exile up to one target non-Saga, nonland permanent that player controls until Battle at the Helvault leaves the battlefield.
Create Avacyn, a legendary 8/8 white Angel creature token with
flying (This creature can't be blocked except by creatures with flying or reach.),
vigilance (Attacking doesn't cause this creature to tap.), and
indestructible (Effects that say "destroy" don't destroy that permanent. An indestructible creature can't be destroyed by damage.).