Roads Go Ever, Ever On [The Hobbit]

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)
I — Search your library for up to two basic Plains cards, exile them, then shuffle. You gain 2 life.
II, III — Put a card exiled with this Saga into its owner's hand.
IV — Whenever you attack this turn, target creature you control gets +1/+1 until end of turn for each Plains you control.