Zirda, Glut der Sonne

Gefährte — Jede bleibende Karte in deinem Startdeck hat eine aktivierte Fähigkeit. (Falls du diese Karte als deinen Gefährten erwählt hast, kannst du {3} bezahlen, um sie von außerhalb der Partie auf deine Hand zu nehmen. Spiele Gefährte wie eine Hexerei.)
Fähigkeiten, die du aktivierst und die keine Manafähigkeiten sind, kosten beim Aktivieren {2} weniger. Dieser Effekt kann die Menge Mana in jenen Kosten nicht unter ein Mana reduzieren.
{1}, {T}: Eine Kreatur deiner Wahl kann in diesem Zug nicht blocken.

Zirda, Resplandor del Amanecer

Compañero — Cada carta de permanente en tu mazo inicial tiene una habilidad activada. (Si esta carta es el compañero que eliges, puedes pagar {3} para ponerla en tu mano desde fuera del juego como un conjuro.)
Te cuesta {2} menos activar las habilidades que no sean habilidades de maná. Este efecto no puede reducir esos costes a menos de un maná.
{1}, {T}: La criatura objetivo no puede bloquear este turno.

Zirda, éveilleur de l'aube

Compagnon — Chaque carte de permanent dans votre deck de départ a une capacité activée. (Si cette carte est le compagnon de votre choix, vous pouvez la mettre dans votre main depuis l'extérieur de la partie pour {3} lorsque vous pourriez lancer un rituel.)
Les capacités que vous activez qui ne sont pas des capacités de mana coûtent {2} de moins à activer. Cet effet ne peut pas réduire le mana de ce coût à moins de un mana.
{1}, {T} : Une créature ciblée ne peut pas bloquer ce tour-ci.

Zirda, il Destaurora

Compagno — Ogni carta permanente nel tuo mazzo iniziale ha un'abilità attivata. (Se questa carta è il compagno che hai scelto, puoi aggiungerla alla tua mano dal di fuori della partita come una stregoneria, pagando {3}.)
Le abilità che attivi e che non sono abilità di mana costano {2} in meno per essere attivate. Questo effetto non può ridurre il mana in quel costo a meno di un mana.
{1}, {T}: Una creatura bersaglio non può bloccare in questo turno.

黎明起こし、ザーダ

相棒 ― あなたの開始時のデッキに入っている各パーマネント・カードが、それぞれ起動型能力を持っていること。（このカードがあなたの選んだ相棒であるなら、あなたはソーサリーとして{3}を支払うことでゲームの外部にあるこれをあなたの手札に加えてもよい。）
あなたがマナ能力でない能力を起動するためのコストは{2}少なくなる。この効果は、そのコストに含まれるマナの点数を１点未満に減らせない。
{1}, {T}：クリーチャー１体を対象とする。このターン、それではブロックできない。

Zirda, o Brilho da Aurora

Companheiro — Cada card de permanente em seu deck inicial tem uma habilidade ativada. (Se este card for seu companheiro escolhido, você pode colocá-lo em sua mão de fora do jogo por {3} como um feitiço.)
As habilidades que você ativa que não sejam habilidades de mana custam {2} a menos para serem ativadas. Este efeito não pode reduzir o custo a menos de um mana.
{1}, {T}: A criatura alvo não pode bloquear neste turno.

熠晓灵狐泽尔达

行侣～你起始套牌中各永久物牌均具有起动式异能。（如果你选择这张牌作为你的行侣，则你可以在法术时机下支付{3}来将它从游戏外置于你手上。）
你起动之不属于法术力异能的异能减少{2}来起动。此效应无法将该费用中的法术力减少到少于一点法术力。
{1}，{T}：目标生物本回合不能进行阻挡。

Zirda, the Dawnwaker

Companion — Each permanent card in your starting deck has an activated ability. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.)
Abilities you activate that aren't mana abilities cost {2} less to activate. This effect can't reduce the mana in that cost to less than one mana.
{1}, {T}: Target creature can't block this turn.

Multiverse Legends

Magic Online Promos

If more than one player wishes to reveal a companion, the starting player does so first, and players proceed in turn order. Once a player has chosen not to reveal a companion, that player can't change their mind.

Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keyword abilities are activated abilities (such as cycling) and will have colons in their reminder text.

Activating Zirda's last ability after a creature has blocked won't remove the blocking creature from combat or cause the creature it blocked to become unblocked.

An activated mana ability is one that produces mana as it resolves, not one that costs mana to activate.

Before shuffling your deck to become your library, you may reveal one card from outside the game to be your companion if your starting deck meets the requirements of the companion ability. You can't reveal more than one. It remains revealed outside the game as the game begins.

Effects that reduce the generic mana cost of an activation cost can't reduce that cost's colored mana requirements. The activation cost is reduced by only {1} if doing so reduces that cost to one mana. For example, a cycling cost of {2} would become {1}, and one of {1}{R} would become {R}. The activation cost is unaffected if it already costs one or zero mana (such as the activation cost of Zirda's last ability).

If you reveal a companion outside the game, for as long as it remains there, you may pay {3} any time you could cast a sorcery (that is, you have priority during your main phase and the stack is empty). Once you do, you put it into your hand and behaves like any other card you've brought into the game. For example, if it's discard, countered, or destroyed, it's put into your graveyard, remaining in the game. This is a change from previous rules.

Paying {3} to put your companion into your hand is a special action. It doesn't use the stack and players can't respond to it. Once you take this action, you may cast that card if it's legal to do so before any other player can take actions.

Permanent cards are artifact, creature, enchantment, land, and planeswalker cards. Land cards with basic land types have intrinsic activated mana abilities associated with those types.

The companion ability has no effect if the card is in your starting deck and creates no restriction on putting a card with a companion ability into your starting deck. For example, Zirda may be in your starting deck even if your other permanent cards don't all have activated abilities.

The companion's other abilities apply only if the creature is on the battlefield. They have no effect while the companion is outside the game.

The requirements of the companion ability apply only to your starting deck. They do not apply to your sideboard.

You may have one companion in the Commander variant. Your deck, including your commander, must meet its companion requirement. Your companion is not one of your one hundred cards.

Your companion begins the game outside the game. In tournament play, this means your sideboard. In casual play, it's simply a card you own that's not in your starting deck.

If you reveal a companion outside the game, for as long as it remains there, you may pay {3} any time you could cast a sorcery (that is, you have priority during your main phase and the stack is empty). Once you do, you put it into your hand and behaves like any other card you've brought into the game. For example, if it's discarded, countered, or destroyed, it's put into your graveyard, remaining in the game. This is a change from previous rules.

Wizards of the Coast has issued functional errata for the Companion mechanic. Instead of casting companions from outside the game: Once per game, any time you could cast a sorcery (during your main phase when the stack is empty), you can pay {3} to put your companion from your sideboard into your hand. This is a special action, not an activated ability. It happens immediately and can’t be responded to. It can’t be countered or stopped by cards like Phyrexian Revoker. For more information please see https://magic.wizards.com/en/articles/archive/news/june-1-2020-banned-and-restricted-announcement