Arkaner Stellvertreter

Wenn der Arkane Stellvertreter ins Spiel kommt und falls du ihn gewirkt hast, schicke eine Spontanzauber- oder Hexereikarte deiner Wahl mit Manabetrag kleiner oder gleich der Stärke des Arkanen Stellvertreters aus deinem Friedhof ins Exil. Kopiere die Karte. Du kannst die Kopie wirken, ohne ihre Manakosten zu bezahlen.
//PRT-Prototype_Mech//
{1}{U}{U}
Prototyp (Du kannst diesen Zauberspruch mit anderen Manakosten, Farben und anderer Größe wirken. Er behält seine Fähigkeiten und Typen.)
2/1

Intermédiaire ésotérique

Quand l'Intermédiaire ésotérique arrive sur le champ de bataille, si vous l'avez lancé, exilez une carte d'éphémère ou de rituel ciblée avec une valeur de mana inférieure ou égale à la force de l'Intermédiaire ésotérique depuis votre cimetière. Copiez cette carte. Vous pouvez lancer la copie sans payer son coût de mana.
//PRT-Prototype_Mech//
{1}{U}{U}
Prototype (Vous pouvez lancer ce sort avec un coût de mana, une couleur et une taille différents. Il garde ses capacités et ses types.)
2/1

秘儀の代理者

秘儀の代理者が戦場に出たとき、あなたがこれを唱えていた場合、あなたの墓地にありマナ総量が秘術の代理者のパワー以下で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。それを追放する。そのカードをコピーする。あなたはそのコピーをマナ・コストを支払うことなく唱えてもよい。
//PRT-Prototype_Mech//
{1}{U}{U}
試作（あなたはこの呪文を、異なるマナ・コスト、色、サイズで唱えてもよい。これは能力とタイプを保持する。）
２/１

秘法代行械

当秘法代行械进战场时，若它经你施放，则将目标法术力值等于或小于秘法代行械力量的瞬间或法术牌从你坟墓场放逐。复制该牌。你可以施放该复制品，且不需支付其法术力费用。
//PRT-Prototype_Mech//
{1}{U}{U}
试作（你施放此咒语时可选不同法术力费用、颜色和攻防的版本，其异能与类别不变。）
2/1

Arcane Proxy

Prototype {1}{U}{U} — 2/1 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.)
When Arcane Proxy enters, if you cast it, exile target instant or sorcery card with mana value less than or equal to Arcane Proxy's power from your graveyard. Copy that card. You may cast the copy without paying its mana cost.

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A prototype card is a colorless card in every zone except the stack or the battlefield, as well as while on the stack or the battlefield if not cast as a prototyped spell. Ignore its alternative characteristics in those cases. For example, while it's in your graveyard, Blitz Automaton is a colorless creature card with mana value 7. It can't be the target of Recommission, a spell that targets an artifact or creature card with mana value 3 or less in your graveyard.

Casting a prototyped spell isn't the same as casting it for an alternative cost, and an alternative cost may be applied to a spell cast this way. For example, if an effect allows you to cast an artifact card without paying its mana cost, you could either cast Blitz Automaton normally, or as a prototyped spell.

If an effect copies a prototyped spell, that copy (as well as the token it becomes on the battlefield) will have the same characteristics as the prototyped spell. Similarly, if an effect creates a token that's a copy of a prototyped permanent or causes another permanent to become a copy of it, the copy would have the same characteristics as the prototyped permanent.

If another effect causes Arcane Proxy's power to be less than the mana value of the target card as the ability tries to resolve, the target is illegal. The card won't be exiled, and you won't get to cast a copy.

If the spell you cast has {X} in its mana cost, you must choose 0 as the value of X.

If you cast a spell "without paying its mana cost," you can't pay any alternative costs. You can, however, pay additional costs, such as kicker costs. If the card has any mandatory additional costs, you must pay those.

If you don't want to cast the copy, you can choose not to; the copy ceases to exist the next time state-based actions are checked.

Regardless of how it was cast, a prototype card always has the same name, abilities, types, and so on. Only the mana cost, mana value, color, power, and toughness change depending on whether the card was cast as a prototyped spell.

The prototype ability functions in any zone that the spell could be cast from. For example, if an effect allows you to cast artifact spells from your graveyard, you could cast a prototyped Blitz Automaton from your graveyard.

When cast as a prototyped spell, that spell has the mana cost, power, and toughness characteristics shown in its colored, secondary text box rather than the normal values of those characteristics. Its color and mana value are determined by that mana cost. The permanent that spell becomes as it resolves has the same characteristics. If the spell leaves the stack in any other way, or the permanent it becomes leaves the battlefield, it immediately resumes using its normal characteristics.

When casting a prototyped spell, use only its prototype characteristics to determine whether it's legal to cast it. For example, if Blitz Automaton is exiled with the last ability of Chandra, Dressed to Kill, you would be able to cast it for {2}{R} (because it's a red spell), even though you wouldn't be able to cast it as a colorless spell for its normal cost.

You cast the copy while the ability is resolving and still on the stack. You can't wait to cast it later in the turn.