Fable of the Mirror-Breaker

Enchantment — Saga

(As this Saga enters and after your draw step, add a lore counter.) I — Create a 2/2 red Goblin Shaman creature token with "Whenever this token attacks, create a Treasure token." II — You may discard up to two cards. If you do, draw that many cards. III — Exile this Saga, then return it to the battlefield transformed under your control.