Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step, Skipped chapters don't trigger. Sacrifice after III.)

I : You may cast an instant or sorcery spell with mana value 1 or 2 from your hand without paying its mana cost.
II : Target player mills four cards.
III : Exile target instant or sorcery card from your graveyard. Copy it. You may cast the copy.