Lunar Force — ruling 1

You can’t choose not to sacrifice Lunar Force.

Lunar Force — ruling 2

You sacrifice Lunar Force even if the spell’s already been countered, perhaps by the ability of another Lunar Force, or if the spell can’t be countered.

Lunar Force — ruling 3

The spell will be countered even if Lunar Force can’t be sacrificed, most likely because it has already left the battlefield. Casting a spell in response to an opponent’s Lunar Force’s triggered ability is generally a bad idea.

Lunar Force : règles, fonctionnement et interactions (MTG)

Lunar Force 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

When an opponent casts a spell, sacrifice this enchantment and counter that spell.

Complete guide

Lunar Force is a blue enchantment that serves as a passive, automatic deterrent for your opponents. Once it is on the battlefield, it sits in wait to immediately negate the very next threat your opponent attempts to play. This card is a powerful tool for control players who want to force their opponents to play around a visible counterspell.

What It Does

Lunar Force has a mandatory triggered ability. Unlike a traditional counterspell that you cast from your hand, this enchantment is public information. It watches the stack constantly, and the moment an opponent casts any spell—whether it is a creature, instant, sorcery, or even another enchantment—Lunar Force triggers to stop it.

Step-by-Step Resolution

When an opponent casts a spell, the triggered ability of Lunar Force is put onto the stack on top of that spell. As the ability resolves, two things happen in order: first, you sacrifice Lunar Force, and second, the opponent's spell is countered. It is important to note that you cannot choose to 'save' the enchantment for a later spell; it must trigger on the first available legal target.

Common Pitfalls

A common mistake is thinking that if the spell can't be countered (like a spell with 'This spell can't be countered'), you get to keep Lunar Force. This is incorrect. You still sacrifice the enchantment even if the spell is uncounterable. Similarly, if you have two Lunar Forces, both will trigger for the same spell, and you will be forced to sacrifice both even though only one is needed to counter the spell.

When to Play It

Lunar Force is most effective when your opponent is low on resources or relies on a single high-impact spell to win. Since it is a mandatory trigger, opponents will often try to 'bait' it out with a low-value spell before playing their actual threat. It excels in decks that can recur enchantments from the graveyard to repeatedly lock down the game.

Interaction examples

Taxing the Opponent

Rhystic Study

If you control both Lunar Force and Rhystic Study, and an opponent casts a spell, both enchantments will trigger. You can choose the order they are put on the stack. If you put the Lunar Force trigger on top, it will resolve first, sacrificing itself and countering the spell. Then the Rhystic Study trigger resolves, asking the opponent to pay {1} or let you draw a card, even though their spell is already gone.

Defensive Layering

Propaganda

With Propaganda on the battlefield, your opponent is pressured to spend mana just to attack you. If they attempt to cast a spell to remove Propaganda, Lunar Force will automatically trigger. This forces the opponent to choose between losing their removal spell to the Force or casting a different spell first to 'clear' the Force, potentially leaving them without enough mana to pay the Propaganda tax for their attackers.

Guide written with AI from the official text and rulings. Official English text prevails.

How it works : Lunar Force

Original English text — Wizards of the Coast / Scryfall

#1July 13, 2016· Wizards of the Coast
You can’t choose not to sacrifice Lunar Force.
No other card is named in this ruling.
#2July 13, 2016· Wizards of the Coast
You sacrifice Lunar Force even if the spell’s already been countered, perhaps by the ability of another Lunar Force, or if the spell can’t be countered.
No other card is named in this ruling.
#3July 13, 2016· Wizards of the Coast
The spell will be countered even if Lunar Force can’t be sacrificed, most likely because it has already left the battlefield. Casting a spell in response to an opponent’s Lunar Force’s triggered ability is generally a bad idea.
No other card is named in this ruling.