Down in the Valley

'(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)
I — Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
II — This Saga gains "Landfall — Whenever a land you control enters, create a 1/1 green Elf creature token."
III, IV — Elves you control get +1/+0 and gain vigilance until end of turn.