The Legend of Roku (TLA-145) - Avatar: The Last Airbender

(As this Saga enters and after your draw step, add a lore counter.)

[I] Exile the top three cards of your library. Until the end of your next turn, you may play those cards.

[II] Add one mana of any color.

[III] Exile this Saga, then return it to the battlefield transformed under your control.

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Avatar Roku

Firebending 4 (Whenever this creature attacks, add RRRR. This mana lasts until end of combat.)

8: Create a 4/4 red Dragon creature token with flying and firebending 4.