Explore the Junkyard

(As this Saga enters and after your draw step, add a
lore counter. Sacrifice after III.)
I, II - Mill two cards, then exile a card at random
from your graveyard. If it's an artifact card, put
it into your hand. Otherwise, add {c}.
III - If there are twenty or more cards in your
graveyard, you may return an artifact card
from your graveyard to the battlefield.