Die Gegenwart ist eine Frage der Perspektive.

Echo der Zeitalter

Jeder Spieler mischt die Karten auf seiner Hand und in seinem Friedhof in seine Bibliothek und zieht dann sieben Karten.
Rückblende {2}{U} (Du kannst diese Karte aus deinem Friedhof für ihre Rückblendekosten wirken. Schicke sie danach ins Exil.)

El presente es una cuestión de perspectiva.

Eco de los eones

Cada jugador baraja su mano y su cementerio en su biblioteca, luego roba siete cartas.
Retrospectiva {2}{U}. (Puedes lanzar esta carta desde tu cementerio pagando su coste de retrospectiva. Luego exíliala.)

Le présent est une question de perspective.

Écho des éons

Chaque joueur mélange sa main et son cimetière avec sa bibliothèque et pioche ensuite sept cartes.
Flashback {2}{U} (Vous pouvez lancer cette carte depuis votre cimetière pour son coût de flashback. Exilez-la ensuite.)

Il presente è una questione di prospettiva.

Eco degli Eoni

Ogni giocatore rimescola la propria mano e il proprio cimitero nel proprio grimorio, poi pesca sette carte.
Flashback {2}{U} (Puoi lanciare questa carta dal tuo cimitero pagando il suo costo di flashback. Poi esiliala.)

永劫のこだま

各プレイヤーはそれぞれ、自分の手札と墓地を自分のライブラリーに加えて切り直し、その後カードを７枚引く。
フラッシュバック{2}{U}（あなたはあなたの墓地から、このカードをこれのフラッシュバック・コストで唱えてもよい。その後、これを追放する。）

영겁의 메아리

각 플레이어는 자신의 손과 무덤을 서고에 섞어 넣은 후, 카드 일곱 장을 뽑는다.
회상 {2}{U} (당신은 이 카드의 회상 비용을 지불해 이 카드를 당신의 무덤에서 발동할 수 있다. 그 후 이 카드를 추방한다.)

Eco das Eras

Cada jogador embaralha a própria mão e o próprio cemitério no próprio grimório e compra sete cards.
Recapitular {2}{U} (Você pode conjurar este card de seu cemitério pagando seu custo de recapitular. Depois, exile-o.)

Настоящее — это вопрос перспективы.

Эхо Тысячелетий

Каждый игрок втасовывает свои руку и кладбище в свою библиотеку, затем берет семь карт.
Воспоминание {2}{U} (Вы можете разыграть эту карту из вашего кладбища за ее стоимость Воспоминания. Затем изгоните ее.)

亘古回声

每位牌手将其手牌与坟墓场洗入其牌库，然后各抓七张牌。
返照{2}{U}（你可以从你的坟墓场施放此牌，并支付其返照费用，然后将它放逐。）

亙古回聲

每位玩家將其手牌與墳墓場洗入其牌庫，然後各抽七張牌。
返照{2}{U}（你可以從你的墳墓場施放此牌，並支付其返照費用，然後將它放逐。）

Echo of Eons

Each player shuffles their hand and graveyard into their library, then draws seven cards.
Flashback {2}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Magic Online Promos

Mystery Booster 2

Each player shuffles their hand and graveyard into their library, then draws seven cards.
Flashback {2}{U}

Secret Lair Drop

Modern Horizons

Echo of Eons won't be put into your graveyard until after it's finished resolving, which means it won't be shuffled into your library as part of its own effect.

"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.