This Is How It Ends — ruling 1

When a player faces a villainous choice, they first choose one of the two options, then all actions in the chosen option are performed.

This Is How It Ends — ruling 2

If a spell or ability requires multiple players to face a villainous choice, the result is a little different from other effects in Magic. In that case, the first player in turn order makes their choice and the action for that choice is performed before the next player makes their choice. Then each of the remaining players repeat this process in turn order.

This Is How It Ends — ruling 3

A player facing a villainous choice can always choose either option, even if one or both of the options are impossible. For example, if one of the options is to sacrifice a creature, a player who controls no creatures can still choose that option.

This Is How It Ends : règles, fonctionnement et interactions (MTG)

This Is How It Ends is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Target creature's owner shuffles it into their library, then faces a villainous choice — They lose 5 life, or they shuffle another creature they own into their library.

How it works : This Is How It Ends

Original English text — Wizards of the Coast / Scryfall

#1October 13, 2023· Wizards of the Coast
When a player faces a villainous choice, they first choose one of the two options, then all actions in the chosen option are performed.
No other card is named in this ruling.
#2October 13, 2023· Wizards of the Coast
If a spell or ability requires multiple players to face a villainous choice, the result is a little different from other effects in Magic. In that case, the first player in turn order makes their choice and the action for that choice is performed before the next player makes their choice. Then each of the remaining players repeat this process in turn order.
No other card is named in this ruling.
#3October 13, 2023· Wizards of the Coast
A player facing a villainous choice can always choose either option, even if one or both of the options are impossible. For example, if one of the options is to sacrifice a creature, a player who controls no creatures can still choose that option.
No other card is named in this ruling.