Fall der brennenden Masken

Wenn dieser Fall ins Spiel kommt, fügt er einer Kreatur deiner Wahl, die ein Gegner kontrolliert, 3 Schadenspunkte zu.
Lösen — Drei oder mehr Quellen haben in diesem Zug unter deiner Kontrolle Schaden zugefügt. (Falls ungelöst, löse den Fall zu Beginn deines Endsegments.)
Gelöst — Opfere diesen Fall: Schicke die obersten drei Karten deiner Bibliothek ins Exil. Bestimme eine davon. Du kannst sie in diesem Zug spielen.

Caso de las máscaras ardientes

Cuando este Caso entre al campo de batalla, hace 3 puntos de daño a la criatura objetivo que controla un oponente.
Resolver — Tres o más fuentes que controlabas hicieron daño este turno. (Si el Caso no está resuelto, resuélvelo al comienzo de tu paso final.)
Resuelto — Sacrificar este Caso: Exilia las tres primeras cartas de tu biblioteca. Elige una de ellas. Puedes jugar esa carta este turno.

Affaire des masques brûlants

Quand cette affaire arrive sur le champ de bataille, elle inflige 3 blessures à une créature ciblée qu'un adversaire contrôle.
À résoudre — Au moins trois sources que vous contrôliez ont infligé des blessures ce tour-ci. (Si l'affaire n'est pas résolue, résolvez-la au début de votre étape de fin.)
Résolue — Sacrifiez cette affaire : Exilez les trois cartes du dessus de votre bibliothèque. Choisissez l'une d'elles. Vous pouvez jouer cette carte ce tour-ci.

Caso delle Maschere Bruciate

Quando questo Caso entra nel campo di battaglia, infligge 3 danni a una creatura bersaglio controllata da un avversario.
Risolvere — Tre o più fonti che controllavi hanno inflitto danno in questo turno. (Se irrisolto, risolvilo all'inizio della tua sottofase finale.)
Risolto — Sacrifica questo Caso: Esilia le prime tre carte del tuo grimorio. Scegli una di quelle carte. Puoi giocare quella carta in questo turno.

燃える仮面の事件

この事件が戦場に出たとき、対戦相手がコントロールしているクリーチャー１体を対象とする。これはそれに３点のダメージを与える。
解明条件 — このターンに、あなたがコントロールしている３つ以上の発生源がダメージを与えた。（未解明なら、あなたの終了ステップの開始時に解明する。）
解明完了 — この事件を生け贄に捧げる：あなたのライブラリーの一番上にあるカード３枚を追放する。そのうち１枚を選ぶ。このターン、そのカードをプレイしてもよい。

Caso das Máscaras Ardentes

Quando este Caso entra no campo de batalha, ele causa 3 pontos de dano à criatura alvo que um oponente controla.
Para Solucionar — Três ou mais fontes que você controla causaram dano neste turno. (Se o Caso não tiver sido solucionado, solucione-o no início de sua etapa final.)
Solucionado — Sacrifique este Caso: Exile os três cards do topo de seu grimório. Escolha um deles. Você pode jogar aquele card neste turno.

面具焚迹案

当此案件进战场时，它向目标由对手操控的生物造成3点伤害。
侦办～本回合中有三个或更多由你操控的来源造成过伤害。（若本案未侦结，则在你的结束步骤开始时侦办。）
侦结～牺牲此案件：放逐你牌库顶的三张牌。选择其中一张。本回合中，你可以使用该牌。

Case of the Burning Masks

When this Case enters, it deals 3 damage to target creature an opponent controls.
To solve — Three or more sources you controlled dealt damage this turn. (If unsolved, solve at the beginning of your end step.)
Solved — Sacrifice this Case: Exile the top three cards of your library. Choose one of them. You may play that card this turn.

Murders at Karlov Manor

When this Case enters the battlefield, it deals 3 damage to target creature an opponent controls.
To solve — Three or more sources you controlled dealt damage this turn. (If unsolved, solve at the beginning of your end step.)
Solved — Sacrifice this Case: Exile the top three cards of your library. Choose one of them. You may play that card this turn.

"Solved — [Triggered ability]" means "[Triggered ability]. This ability triggers only if this Case is solved." Triggered abilities use the word "when," "whenever," or "at." They're often written as "[Trigger condition], [effect]."

"Solved — [static ability]" means "As long as this Case is solved, [static ability]." Static abilities are written as statements, such as "Creatures you control get +1/+1" or "Instant and sorcery spells you cast cost {1} less to cast."

"To Solve — [condition]" means "At the beginning of your end step, if [condition] and this Case is not solved, it becomes solved."

"To solve" abilities will check for their condition twice: once when the ability would trigger, and once when it resolves. If the condition isn't true at the beginning of your end step, the ability won't trigger at all. If the condition isn't true when the ability resolves, the Case won't become solved.

A permanent that deals damage multiple times without changing zones still counts as only one source. For example, if you attack with Incinerator of the Guilty and deal combat damage with it, use its triggered ability to deal damage, and then use Hard-Hitting Question to have it deal damage to another creature, it's still just one source even though it dealt damage three times during the turn.

Activated and triggered abilities are not themselves sources of damage. The source of an activated ability is the object whose ability was activated, and the source of a triggered ability (other than a delayed triggered ability) is the object whose ability triggered.

Being solved is not part of a permanent's copiable values. A permanent that becomes a copy of a solved Case is not solved. A solved Case that somehow becomes a copy of a different Case stays solved.

Cases don't lose their other abilities when they become solved.

Each Case has two special keyword abilities: to solve and solved.

If multiple creatures you control deal combat damage, each one counts as a source that dealt damage that turn. A single creature that deals combat damage multiple times in a turn (due to double strike or additional combats) still counts as only one source.

Once a Case becomes solved, it stays solved until it leaves the battlefield.

Something that changes zones becomes a new object in that zone and will therefore be a new source. For example, if you cast Flametongue Kavu, deal damage with its enters-the-battlefield ability, exile and return it to the battlefield with Momentary Blink, deal damage again, then cast Momentary Blink with flashback on Flametongue Kavu to repeat the process one more time, you've fulfilled Case of the Burning Masks's "to solve" trigger condition. 

The meaning of "solved" differs based on what type of ability follows it. "Solved — [activated ability]" means "[Activated ability]. Activate only if this Case is solved." Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." 

You need to control the sources that dealt damage only at the times when they dealt damage. If they die or change control after that point, the "to solve" ability will still trigger at the beginning of your end step as long as you still control Case of the Burning Masks.

You pay all costs and follow all normal timing rules for the card played from exile with Case of the Burning Masks's last ability. For example, if the exiled card is a land card, you may play it only during your main phase while the stack is empty.