Sphinx des vergessenen Wissens

Aufblitzen (Du kannst diesen Zauberspruch zu jedem Zeitpunkt wirken, zu dem du einen Spontanzauber wirken könntest.)
Fliegend
Immer wenn diese Kreatur angreift, erhält eine Spontanzauber- oder Hexereikarte deiner Wahl in deinem Friedhof Rückblende bis zum Ende des Zuges. Die Rückblendekosten sind gleich den Manakosten jener Karte. (Du kannst die Karte aus deinem Friedhof für ihre Rückblendekosten wirken. Schicke sie danach ins Exil.)

Sphinx de la sapience oubliée

Flash (Vous pouvez lancer ce sort à tout moment où vous pourriez lancer un éphémère.)
Vol
À chaque fois que cette créature attaque, une carte d'éphémère ou de rituel ciblée de votre cimetière acquiert le flashback jusqu'à la fin du tour. Le coût de flashback est égal au coût de mana de cette carte. (Vous pouvez lancer cette carte depuis votre cimetière pour son coût de flashback. Exilez-la ensuite.)

忘れ去られし伝承のスフィンクス

瞬速（この呪文を、あなたがインスタントを唱えられるときならいつでも唱えてよい。）
飛行
このクリーチャーが攻撃するたび、あなたの墓地にありインスタントやソーサリーであるカード１枚を対象とする。ターン終了時まで、それはフラッシュバックを得る。そのフラッシュバック・コストは、そのカードのマナ・コストに等しい。（あなたの墓地にあるそのカードをフラッシュバック・コストで唱えてもよい。その後、それを追放する。）

Sphinx of Forgotten Lore

Flash (You may cast this spell any time you could cast an instant.)
Flying
Whenever this creature attacks, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to that card's mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

Foundations

Flash
Flying
Whenever this creature attacks, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to that card's mana cost.

Foundations Promos

"Flashback [cost]" means "You may cast this card from your graveyard 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."

A spell cast using flashback will always be exiled afterward, whether it resolves, is countered, or leaves the stack in some other way.

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.

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.

You can cast a spell using flashback even if it was somehow put into your graveyard without having been cast.

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.