Unverdächtige Ermittlerin

Verhandlungen — Immer wenn die Unverdächtige Ermittlerin angreift, deckt jeder Spieler die oberste Karte seiner Bibliothek auf. Stelle für jede auf diese Weise aufgedeckte Nichtland-Karte Nachforschungen an. Dann zieht jeder Spieler eine Karte.
Zu Beginn deines Endsegments kannst du alle Länder, die du kontrollierst, enttappen. Falls du dies tust, kannst du bis zu deinem nächsten Zug keine Zaubersprüche wirken.

Chercheur inoffensif

Pourparler — À chaque fois que le Chercheur inoffensif attaque, chaque joueur révèle la carte du dessus de sa bibliothèque. Pour chaque carte non-terrain révélée de cette manière, vous enquêtez. Chaque joueur pioche ensuite une carte.
Au début de votre étape de fin, vous pouvez dégager tous les terrains que vous contrôlez. Si vous faites ainsi, vous ne pouvez pas lancer de sorts jusqu'à votre prochain tour.

Ricercatore Innocuo

Negoziato — Ogniqualvolta il Ricercatore Innocuo attacca, ogni giocatore rivela la prima carta del proprio grimorio. Per ogni carta non terra rivelata in questo modo, indaghi. Poi ogni giocatore pesca una carta.
All'inizio della tua sottofase finale, puoi STAPpare tutte le terre che controlli. Se lo fai, non puoi lanciare magie fino al tuo prossimo turno.

無害の研究者

協議 ― 無害の研究者が攻撃するたび、各プレイヤーはそれぞれ自分のライブラリーの一番上にあるカード１枚を公開する。あなたは、これにより公開されて土地でないカード１枚につき１回調査を行う。その後、各プレイヤーはそれぞれカード１枚を引く。
あなたの終了ステップの開始時に、あなたがコントロールしているすべての土地をアンタップしてもよい。そうしたなら、次のあなたのターンまで、あなたは呪文を唱えられない。

Innocuous Researcher

Parley — Whenever Innocuous Researcher attacks, each player reveals the top card of their library. For each nonland card revealed this way, you investigate. Then each player draws a card.
At the beginning of your end step, you may untap all lands you control. If you do, you can't cast spells until your next turn.

Murders at Karlov Manor Commander

Except in some very unusual cases, the card each player reveals is the one they’ll draw.

Clue is an artifact type. Even though it appears on some cards with other permanent types, it’s never a creature type, a land type, or anything but an artifact type.

If an effect refers to a Clue, it means any Clue artifact, not just a Clue artifact token. For example, you can sacrifice Wrench to pay for Alquist Proft, Master Sleuth’s activated ability.

Some abilities trigger “whenever you sacrifice a Clue”. Those abilities trigger whenever you sacrifice a Clue for any reason, not just to activate a Clue’s activated ability.

Some spells and abilities that investigate may require targets. If each target chosen is an illegal target as that spell or ability tries to resolve, it won’t resolve. You won’t create any Clue tokens.

There’s no window for you to cast spells after untapping all lands you control but before the “you can’t cast spells” portion of Innocuous Researcher’s last ability takes effect. Once that ability resolves, it doesn’t matter whether Innocuous Researcher stays on the battlefield; you’ll still be unable to cast spells until your next turn begins.

You can’t sacrifice a Clue to pay multiple costs. For example, you can’t sacrifice a Clue token to activate its own ability and also to activate Alquist Proft, Master Sleuth’s ability.