(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
[I] You may sacrifice a creature. When you do, Kardur's Vicious Return deals 3 damage to any target.
[II] Each player discards a card.
[III] Return target creature card from your graveyard to the battlefield. Put a +1/+1 counter on it. It gains haste until your next turn.