"A regression to ancient forms? A glimpse of future evolutions? Or a fleeting alteration of the present?"
—Vorel of the Hull Clade

„Ein Rückschritt zu uralten Erscheinungsformen? Ein kurzer Blick auf künftige Evolutionen? Oder eine flüchtige Veränderung der Gegenwart?" —Vorel von den Hülsenklade

Mutierende Biomasse

Kreaturen, die du kontrollierst, erhalten X/X bis zum Ende des Zuges.

"¿Una regresión a las viejas costumbres? ¿Un indicio de evoluciones futuras? ¿O una fugaz alteración del presente?"—Vorel del Clado de la Vaina

Mutación de la biomasa

Las criaturas que controlas son X/X hasta el final del turno.

« Régression vers d'anciennes formes ? Avant-goût d'évolutions futures ? Ou altération fugace de l'instant présent ? » —Vorel du Cladus Coque

Mutation de biomasse

Les créatures que vous contrôlez deviennent X/X jusqu'à la fin du tour.

"Una regressione ad antiche forme? Un assaggio di evoluzioni future? O un'instabile alterazione del presente?" —Vorel del Clade del Carapace

Mutazione della Biomassa

Le creature che controlli diventano X/X fino alla fine del turno.

「太古の姿への先祖返りか？ 来たる進化の兆候か？ それとも現在が束の間の変化を見せているのか？」――育殻組のヴォレル・マガ

生体料の突然変異

あなたがコントロールするクリーチャーは、ターン終了時までＸ/Ｘになる。

"과거로의 회귀인가? 미래에 일어날 진화의 전조인가? 아니면 현재의 일시적 변이일 뿐인가?" —헐 클레이드의 보렐

생체물질 변이

당신이 조종하는 생물들은 턴종료까지 X/X가 된다.

"Uma regressão a formas antigas? Um lampejo de evoluções futuras? Ou uma alteração efêmera do presente?"— Vorel, da Cepa do Casco

Mutação de Biomassa

As criaturas que você controla se tornam X/X até o final do turno.

«Возвращение к старым видам? Пример будущих эволюций? Или просто мимолетное изменение настоящего?» — Ворел из Клады Оболочки

Мутация Биомассы

Существа под вашим контролем становятся X/X до конца хода.

「退化为古老形态？窥见未来进化？或是将现在短暂改变？」 ～壳进化组的沃瑞

巨量突变

由你操控的生物成为X/X直到回合结束。

「退化為古老形態？窺見未來進化？或是將現在短暫改變？」 ～殼進化組的沃瑞

巨量突變

由你操控的生物成為X/X直到回合結束。

Biomass Mutation

Creatures you control have base power and toughness X/X until end of turn.

Duskmourn: House of Horror Commander

Vault 87's Evolutionary Experimentation Program exposed subjects to an airborne version of FEV. Rapid physical enhancements accompanied sharp mental regression, and the oldest mutants would become almost feral.

Fallout

Biomass Mutation overwrites any effects that set the power and/or toughness of a creature you control to a specific value. Effects that modify power and/or toughness but don't set them to a specific value (like the one created by Giant Growth), power/toughness changes from counters, and effects that switch a creature's power and toughness will continue to apply. For example, say you control a 1/1 creature that's getting +4/+2 from an Aura, has a +1/+1 counter on it, and is affected by an effect that switches its power and toughness. This creature is 4/6. If you cast Biomass Mutation with X equal to 4, the creature would become 7/9 (4/4, +4/+2 from the Aura, +1/+1 from the counter, then switch power and toughness).

Choosing 0 as the value for X will likely cause creatures you control to become 0/0 and be put into the graveyard.