Fall from Favor

Mana cost: {2}{U}
Type: Enchantment — Aura
Set: Commander Masters #93 (common)
Price: $0.18 USD

Enchant creature
When this Aura enters, tap enchanted creature and you become the monarch.
Enchanted creature doesn't untap during its controller's untap step unless that player is the monarch.

Fall from Favor has 4 printings, first in Commander Legends (2020). EDHREC ranks it #14,735 among Commander cards. It appears most in Aragorn, King of Gondor decks (634 on EDHREC). 1 public deck on TCG runs it. It has 6 official rulings.

Legality

commander: legal
legacy: legal
vintage: legal
pauper: banned
modern: not legal
pioneer: not legal
standard: not legal
brawl: not legal

Public decks that run Fall from Favor

Keen Engineering - Foundations Commander, led by Sai, Master Thopterist

Commanders that run Fall from Favor most

Deck counts from EDHREC.

Often played with Fall from Favor

Cards that show up in the same decks on EDHREC.

Rulings

2020-11-10: 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.
2020-11-10: 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.
2020-11-10: If the target creature is an illegal target by the time Fall from Favor tries to resolve, it doesn't resolve. It won't enter the battlefield, so its enters-the-battlefield ability won't trigger.
2020-11-10: 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.
2020-11-10: 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."
2020-11-10: 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.