Jumeaux au cœur pur

Vous pouvez surmener les Jumeaux au cœur pur au moment où ils attaquent. (Ils se dégagent pas pendant votre prochaine étape de dégagement.)
À chaque fois que vous surmenez une créature, les créatures que vous contrôlez gagnent +1/+0 jusqu'à la fin du tour.

Seite an Seite, bis Klinge auf Klinge trifft.

Starkherz-Zwillinge

Du kannst die Starkherz-Zwillinge erschöpfen, sowie sie angreifen. (Sie enttappen nicht während deines nächsten Enttappsegments.)
Immer wenn du eine Kreatur erschöpfst, erhalten Kreaturen, die du kontrollierst, +1/+0 bis zum Ende des Zuges.

Codo con codo hasta que el filo deba volverse contra el filo.

Mellizos almafirme

Puedes espolear a los Mellizos almafirme en cuanto ataquen. (No se enderezarán durante tu próximo paso de enderezar.)
Siempre que espolees una criatura, las criaturas que controlas obtienen +1/+0 hasta el final del turno.

Fianco a fianco finché non verrà il momento di incrociare le lame.

Gemelli dal Cuore Saldo

Puoi stremare i Gemelli dal Cuore Saldo mentre attaccano. (Non STAPperanno durante il tuo prossimo STAP.)
Ogniqualvolta stremi una creatura, le creature che controlli prendono +1/+0 fino alla fine del turno.

刃を向かい合わせねばならぬ日までは一心同体。

信念の双子

信念の双子が攻撃するに際し、これを督励してもよい。（これは次のあなたのアンタップ・ステップにアンタップしない。）
あなたがクリーチャー１体を督励するたび、ターン終了時まで、あなたがコントロールしているすべてのクリーチャーは＋１/＋０の修整を受ける。

Trueheart Twins

You may exert Trueheart Twins as it attacks. (It won't untap during your next untap step.)
Whenever you exert a creature, creatures you control get +1/+0 until end of turn.

Foundations Jumpstart

Amonkhet

All cards in the Amonkhet set that let you exert a creature let you do so as you declare it as an attacking creature, as do some of the cards in the Hour of Devastation set. You can't do so later in combat, and creatures put onto the battlefield attacking can't be exerted. Any abilities that trigger on exerting an attacking creature will resolve before blockers are declared.

If an exerted creature is already untapped during your next untap step (most likely because it had vigilance or an effect untapped it), exert's effect preventing it from untapping expires without having done anything.

If you gain control of another player's creature until end of turn and exert it, it will untap during that player's untap step.

Some cards have abilities that trigger whenever you exert any creature. These abilities trigger when you exert that creature or any other creature you control.

You can't exert a creature unless an effect allows you to do so. Similar effects that "tap and freeze" a creature (such as that of Decision Paralysis) don't exert that creature.