Harald Unites the Elves

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) [I] Mill three cards. You may put an Elf or Tyvar card from your graveyard onto the battlefield. [II] Put a +1/+1 counter on each Elf you control. [III] Whenever an Elf you control attacks this turn, target creature an opponent controls get -1/-1 until end of turn.