"It is possible that some queens are not born queens, but evolve into that form over time."
—Rukarumel, field notes

„Möglicherweise werden einige Königinnen nicht als Königinnen geboren, sondern entwickeln sich mit der Zeit zu dieser Gestalt."
—Rukarumel, Tagebucheintrag

Königlicher Remasuri

Remasuri-Kreaturen, die du kontrollierst, haben „Wenn diese Kreatur ins Spiel kommt, erhalten Remasuris, die du kontrollierst, +1/+1 bis zum Ende des Zuges, falls du der Monarch bist. Anderenfalls wirst du zum Monarchen."

« Il est possible que certaines reines ne soient pas nées reines, mais évoluent vers cette forme avec le temps. »
—Observations de terrain de Rukarumel

Slivoïde royal

Les créatures Slivoïde que vous contrôlez ont « Quand cette créature arrive sur le champ de bataille, les slivoïdes que vous contrôlez gagnent +1/+1 jusqu'à la fin du tour si vous êtes le monarque. Sinon, vous devenez le monarque. »

「女王の中には、生まれながらにして女王であるのではなく、時間を掛けてその姿に進化していくものもいる。」
――ルカルメルの観察日誌

威厳スリヴァー

あなたがコントロールしているすべてのスリヴァー・クリーチャーは「このクリーチャーが戦場に出たとき、あなたが統治者であるなら、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スリヴァーは＋１/＋１の修整を受ける。そうでないなら、あなたが統治者になる。」を持つ。

Regal Sliver

Sliver creatures you control have "When this creature enters, Slivers you control get +1/+1 until end of turn if you're the monarch. Otherwise, you become the monarch."

Commander Masters

Sliver creatures you control have "When this creature enters the battlefield, Slivers you control get +1/+1 until end of turn if you're the monarch. Otherwise, you become the monarch."

If combat damage dealt to the monarch causes that player to lose the game, the triggered ability that causes the controller of the attacking creature to become the monarch doesn't resolve. In most cases, the controller of the attacking creature will still become the monarch as it is likely their turn.

If the monarch leaves the game during another player's turn, that player becomes the monarch. If the monarch leaves the game during their turn, the next player in turn order becomes the monarch.

If the triggered ability that causes the monarch to draw a card goes on the stack and a different player becomes the monarch before that ability resolves, the first player will still draw the card.

The game starts with no monarch. Once an effect makes one player the monarch, the game will have exactly one monarch from that point forward. As a player becomes the monarch, the current monarch (if any) ceases being the monarch.

There are two inherent triggered abilities associated with being the monarch. These triggered abilities have no source and are controlled by the player who was the monarch at the time the abilities triggered. The full texts of these abilities are "At the beginning of the monarch's end step, that player draws a card" and "Whenever a creature deals combat damage to the monarch, its controller becomes the monarch."

The Monarch

At the beginning of your end step, draw a card.
Whenever a creature deals combat damage to you, its controller becomes the monarch.