(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
[I] Up to one target creature can't block for as long as you control There and Back Again. The Ring tempts you.
[II] Search your library for a Mountain card, put it onto the battlefield, then shuffle.
[III] Create Smaug, a legendary 6/6 red Dragon creature token with flying, haste, and "When this creature dies, create fourteen Treasure tokens."