Herold der Pein

Improvisieren (Deine Artefakte können dir helfen, diesen Zauberspruch zu wirken. Mit jedem Artefakt, das du tappst, nachdem du mit dem Aktivieren deiner Manafähigkeiten fertig bist, bezahlst du {1}.)
Fliegend
Zu Beginn deines Endsegments wirft jeder Gegner eine Karte ab.
{1}{B}, opfere ein Artefakt: Eine Kreatur deiner Wahl erhält -2/-2 bis zum Ende des Zuges.

Heraldo del padecimiento

Improvisar. (Tus artefactos pueden ayudar a lanzar este hechizo. Cada artefacto que gires una vez que termines de activar habilidades de maná paga {1}.)
Vuela.
Al comienzo de tu paso final, cada oponente descarta una carta.
{1}{B}, sacrificar un artefacto: La criatura objetivo obtiene -2/-2 hasta el final del turno.

Héraut de l'angoisse

Improvisation (Vos artefacts peuvent aider à lancer ce sort. Chaque artefact que vous engagez après avoir activé des capacités de mana paie {1}.)
Vol
Au début de votre étape de fin, chaque adversaire se défausse d'une carte.
{1}{B}, sacrifiez un artefact : Une créature ciblée gagne -2/-2 jusqu'à la fin du tour.

Araldo dell'Angoscia

Improvvisare (I tuoi artefatti possono aiutarti a lanciare questa magia. Ogni artefatto che TAPpi dopo aver attivato le abilità di mana corrisponde al pagamento di {1}.)
Volare
All'inizio della tua sottofase finale, ogni avversario scarta una carta.
{1}{B}, Sacrifica un artefatto: Una creatura bersaglio prende -2/-2 fino alla fine del turno.

艱苦の伝令

即席（あなたのアーティファクトが、この呪文を唱える助けとなる。あなたがマナ能力を起動し終えたあとにあなたがタップした各アーティファクトは、{1}を支払う。）
飛行
あなたの終了ステップの開始時に、各対戦相手はそれぞれカード１枚を捨てる。
{1}{B},アーティファクト１つを生け贄に捧げる：クリーチャー１体を対象とする。ターン終了時まで、それは－２/－２の修整を受ける。

Herald of Anguish

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)
Flying
At the beginning of your end step, each opponent discards a card.
{1}{B}, Sacrifice an artifact: Target creature gets -2/-2 until end of turn.

The Brothers' War Commander

Kaladesh Remastered

Aether Revolt Promos

Aether Revolt

Improvise can't pay for {W}, {U}, {B}, {R}, {G}, or {C} mana symbols in a spell's total cost.

Improvise doesn't change a spell's mana cost or mana value.

Tapping an artifact won't cause its abilities to stop applying unless those abilities say so.

Because improvise isn't an alternative cost, it can be used in conjunction with alternative costs.

Equipment attached to a creature doesn't become tapped when that creature becomes tapped, and tapping that Equipment doesn't cause the creature to become tapped.

If an artifact you control has a mana ability with {T} in the cost, activating that ability while casting a spell with improvise will result in the artifact being tapped when you pay the spell's costs. You won't be able to tap it again for improvise. Similarly, if you sacrifice an artifact to activate a mana ability while casting a spell with improvise, that artifact won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for improvise.

Improvise can't be used to pay for anything other than the cost of casting the spell. For example, it can't be used during the resolution of an ability that says “Counter target spell unless its controller pays {3}.”

When calculating a spell's total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell. Improvise applies after the total cost is calculated.