Azula, Cunning Usurper is a rare Legendary Creature — Human Noble Rogue card from Avatar: The Last Airbender (TLA), collector number 208. Current market price: $0.31 (foil $0.40), TCGplayer market prices via Scryfall.
Firebending 2 (Whenever this creature attacks, add {R}{R}. This mana lasts until end of combat.) When Azula enters, target opponent exiles a nontoken creature they control, then they exile a nonland card from their graveyard. During your turn, you may cast cards exiled with Azula and you may cast them as though they had flash. Mana of any type can be spent to cast those spells.