Palace Jailer

When this creature enters, you become the monarch.
When this creature enters, exile target creature an opponent controls until an opponent becomes the monarch.

Commander Masters

When Palace Jailer enters the battlefield, you become the monarch.
When Palace Jailer enters the battlefield, exile target creature an opponent controls until an opponent becomes the monarch.

"Is it not a law in the City that those who wear the black and silver must stay in the Citadel?"
—Gandalf

Tales of Middle-earth Commander

Time Spiral Remastered

The List

Treasure Chest

Auras attached to the exiled creature will be put into their owners' graveyards. Equipment attached to the exiled creature will become unattached and remain on the battlefield. Counters on the exiled creature will cease to exist.

Being the monarch carries two inherent triggered abilities. "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."

If a creature token is exiled, it ceases to exist. It won't return to the battlefield.

If you're not the monarch as Palace Jailer's second ability resolves, the creature will be exiled until there's a new monarch and that player is one of your opponents. The creature won't immediately return just because an opponent is the monarch.

In a multiplayer game, if the monarch leaves the game, the player whose turn it is immediately becomes the monarch. If the player whose turn it is has left the game, instead the next player in turn order becomes the monarch.

Palace Jailer leaving the battlefield won't cause the exiled creature to return. The game will continue to watch for the next time an opponent becomes the monarch.

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.

The opponent that controlled the exiled card doesn't have to be the same opponent that becomes the monarch in order to cause that card to return to the battlefield. Any opponent becoming the monarch will cause the card to return.

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.