絢爛なビヒモス

トランプル
絢爛なビヒモスが戦場に出たとき、あなたが統治者になる。
あなたが統治者である間にあなたがマナを引き出す目的で土地を１つタップするたび、（その土地が生み出すマナに加えて）好きな色１色のマナ１点をあなたのマナ・プールに加える。

威严贝西摩斯

践踏
当威严贝西摩斯进战场时，你成为君主。
每当你于你是君主的时段内横置一个地以产生法术力时，加一点任意颜色的法术力到你的法术力池中。（会得到原本该有的法术力，并加上此份法术力。）

Regal Behemoth

Trample
When this creature enters, you become the monarch.
Whenever you tap a land for mana while you're the monarch, add an additional one mana of any color.

The Lost Caverns of Ixalan Commander

Trample
When Regal Behemoth enters the battlefield, you become the monarch.
Whenever you tap a land for mana while you're the monarch, add an additional one mana of any color.

Commander Masters

Conspiracy: Take the Crown

Trample
When Regal Behemoth enters the battlefield, you become the monarch.
Whenever you tap a land for mana while you're the monarch, add one mana of any color to your mana pool (in addition to the mana the land produces).

Abilities that trigger whenever you "become the monarch" trigger only if you aren't already the monarch. For example, if you are already the monarch as Custodi Lich enters the battlefield, its last ability won't trigger.

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 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.

Regal Behemoth's last ability is a triggered mana ability. It doesn't use the stack and can't be responded to.

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.