The Legend of Roku [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.

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.