Founding the Third Path

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 your graveyard. Copy it. You may cast the copy.