Faithless Looting

• WOTC Official Reminder Textofficial rules
  Flashback — Flashback [cost] (You may cast this card from your graveyard for its flashback cost. Then exile it.)

• WWizards of the Coast2016-06-08
  Official Ruling
  You draw two cards and discard two cards all while Faithless Looting is resolving. Nothing can happen between the two, and no player may choose to take actions.
• WWizards of the Coast2025-06-06
  Official Ruling
  To determine the total cost of a spell, start with the mana cost or alternative cost (such as a flashback cost) you're paying, add any cost increases, then apply any cost reductions. The mana value of the spell is determined only by its mana cost, no matter what the total cost to cast the spell was.
• WWizards of the Coast2025-06-06
  Official Ruling
  If a card with flashback is put into your graveyard during your turn, you can cast it if it's legal to do so before any other player can take any actions.
• WWizards of the Coast2025-06-06
  Official Ruling
  "Flashback [cost]" means "You may cast this card from your graveyard if the resulting spell is an instant or sorcery spell by paying [cost] rather than paying its mana cost" and "If the flashback cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack."
• WWizards of the Coast2025-06-06
  Official Ruling
  A spell cast using flashback will always be exiled afterward, whether it resolves, is countered, or leaves the stack in some other way.
• WWizards of the Coast2025-06-06
  Official Ruling
  You must still follow any timing restrictions and permissions, including those based on the card's type. For instance, you can cast a sorcery using flashback only when you could normally cast a sorcery.
• WWizards of the Coast2025-06-06
  Official Ruling
  You can cast a spell using flashback even if it was somehow put into your graveyard without having been cast.

Rulings via Scryfall

• WO
  Wizards of the Coast2019-08-26

  Faithless Looting was banned in modern on August 26, 2019. The key card enabling the majority of these graveyard-focused decks is Faithless Looting. By our data gathered from Magic Online and tabletop tournament results, over the past year the winningest Modern deck at any given point in time has usually been a Faithless Looting deck. As new card designs are released that deal with the graveyard, discarding cards, and casting cheap spells, the power of Faithless Looting's efficient hand and graveyard manipulation continues to scale upward. Source: https://magic.wizards.com/en/news/news/august-26-2019-banned-and-restricted-announcement-2019-08-26
• WO
  Wizards of the Coast2024-12-16

  Faithless Looting was unbanned in modern on December 16, 2024. Now, five years later, we're interested in seeing what Faithless Looting can do without a certain giant Avatar rearing its ugly head. Faithless Looting is unbanned in Modern. Source: https://magic.wizards.com/en/news/announcements/banned-and-restricted-december-16-2024