Teferi, Temporal Archmage — ruling 1

If you control Teferi’s emblem, the rule that says you can activate a loyalty ability only if none of that permanent’s loyalty abilities have been activated that turn still applies. In other words, you could activate a planeswalker’s loyalty ability once on your turn and once on each of your opponents’ turns.

Teferi, Temporal Archmage — ruling 2

If you control The Chain Veil (from the Magic 2015 core set) and its activated ability has resolved, and you also control Teferi’s emblem, for each planeswalker you control, you can activate one of its loyalty abilities during that turn any time you could cast an instant, and then you may activate a loyalty ability again that turn (choosing the same loyalty ability or a different one) any time you could cast an instant.

Teferi, Temporal Archmage : règles, fonctionnement et interactions (MTG)

Teferi, Temporal Archmage is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

+1: Look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library. −1: Untap up to four target permanents. −10: You get an emblem with "You may activate loyalty abilities of planeswalkers you control on any player's turn any time you could cast an instant." Teferi, Temporal Archmage can be your commander.

Complete guide

Teferi, Temporal Archmage is a legendary powerhouse who can serve as your commander and bend the rules of time itself. He provides card selection, mana acceleration through untapping, and a game-ending emblem that allows planeswalkers to operate at instant speed.

Temporal Mastery: The Abilities

Teferi's first ability provides consistent card flow by letting you dig two cards deep and keep the best one. His second ability is exceptionally versatile, untapping up to four permanents which can include lands, artifacts, or creatures to effectively 'refund' his mana cost or provide defensive blockers. Finally, his ultimate creates an emblem that removes the timing restrictions of loyalty abilities, allowing you to use them on opponents' turns at instant speed.

How the Emblem Resolves

When you activate the -10 ability, you receive the Teferi, Temporal Archmage Emblem. This does not change the rule that says you can only activate one loyalty ability per planeswalker per turn; rather, it changes *when* and *whose* turn you can do it. With the emblem, you can activate a loyalty ability once on your turn, and then once on each subsequent opponent's turn, provided the ability is activated when you have priority.

Common Mistakes

The most frequent error is assuming the emblem allows multiple activations per turn; it only allows activations on other players' turns. You still cannot use the same planeswalker's ability twice in a single turn unless another effect, such as an activated Chain Veil, is involved. Additionally, remember that while you can activate these at instant speed, you still must pay the loyalty cost (adding or removing counters) as part of the activation.

Strategic Timing

Use Teferi, Temporal Archmage as your commander to ensure you always have access to his untap ability, which is vital for combo-heavy blue decks. Deploy his emblem as quickly as possible to transform your planeswalkers into reactive tools that can destroy threats or draw cards during an opponent's end step.

Interaction examples

Instant Speed Interaction

Teferi, Temporal Archmage Emblem

Ugin, the Ineffable

With the Teferi, Temporal Archmage Emblem in play, you pass the turn to your opponent. During their combat phase, you can activate the -3 ability of Ugin, the Ineffable at instant speed to destroy their attacking colored creature before it deals damage.

Maximum Loyalty Gain

Teferi, Temporal Archmage Emblem

Ugin, Eye of the Storms

If you control both the emblem and Ugin, Eye of the Storms in a four-player game, you can activate Ugin's +2 ability on your turn, and then again on each of your three opponents' turns. This allows you to gain a total of 12 life and draw 4 cards before your next turn even begins.

Resource Management

Teferi, Temporal Archmage

You cast Teferi, Temporal Archmage using six lands. You immediately use his -1 ability to untap four of those lands. This effectively leaves you with four mana available to cast counterspells or other responses during your opponent's next turn.

Guide written with AI from the official text and rulings. Official English text prevails.

How it works : Teferi, Temporal Archmage

Original English text — Wizards of the Coast / Scryfall

#1November 7, 2014· Wizards of the Coast
If you control Teferi’s emblem, the rule that says you can activate a loyalty ability only if none of that permanent’s loyalty abilities have been activated that turn still applies. In other words, you could activate a planeswalker’s loyalty ability once on your turn and once on each of your opponents’ turns.
No other card is named in this ruling.
#2November 7, 2014· Wizards of the Coast
If you control The Chain Veil (from the Magic 2015 core set) and its activated ability has resolved, and you also control Teferi’s emblem, for each planeswalker you control, you can activate one of its loyalty abilities during that turn any time you could cast an instant, and then you may activate a loyalty ability again that turn (choosing the same loyalty ability or a different one) any time you could cast an instant.
No other card is named in this ruling.