Flash, Chaotic Anarchist

Prowess ; You may cast sorcery spells as though they had flash
Whenever Flash attacks roll a d20:
1:Flash deals damage equal to their power to each creature you control.
2-12:mill cards from the top of your library until you mill an instant or sorcery, exile that spell. You may cast it this turn.
13-19:instants and sorcery spells in your graveyard have flashback until end of turn, their flashback cost is equal to its mana cost.
20:instants and sorcery spells in your graveyard have flashback, and you