Annihilator is a triggered ability in Magic: The Gathering (MTG), primarily found on colorless Eldrazi creatures. When a creature with Annihilator N attacks, the defending player must sacrifice N permanents. This mechanic, introduced in the Rise of the Eldrazi set, is widely regarded as one of the most powerful and psychologically taxing keywords ever printed in the game's history.

The Core Definition of Annihilator

In its simplest form, Annihilator is a numerical keyword (Annihilator 1, Annihilator 2, etc.) that triggers during the Declare Attackers step. The official Comprehensive Rules (702.86) define it as follows: "Annihilator N means 'Whenever this creature attacks, defending player sacrifices N permanents.'"

Because this ability triggers upon the declaration of an attack, it resolves before the opponent even has the chance to declare blockers. This timing is what makes Annihilator devastating; it systematically dismantles an opponent's resources—lands, creatures, enchantments, or planeswalkers—before they can attempt to trade or block in combat.

Deep Dive into Rule 702.86: How It Actually Works

To master the use of Eldrazi titans or to survive an encounter with them, understanding the technical nuances of the stack and priority is essential.

1. The Trigger Timing

Annihilator triggers specifically when a creature is declared as an attacker during the Declare Attackers step. This is a critical distinction in MTG rules. If a creature with Annihilator is put onto the battlefield "already attacking" (for example, through the Ninjutsu ability or a card like Sneak Attack or Kaalia of the Vast), the Annihilator ability will not trigger for that combat. The creature must be on the battlefield and declared as an attacker at the start of the combat phase to force the sacrifice.

2. The Defending Player’s Choice

The choice of which permanents to sacrifice lies entirely with the defending player. While this sounds like a mercy, it rarely is. Usually, an opponent is forced to choose between losing their mana base (lands) or their defensive line (creatures). If the defending player controls fewer permanents than the Annihilator value (e.g., they have 2 lands but face an Annihilator 4 trigger), they must sacrifice everything they control.

3. Non-Targeting Mechanic

Unlike many other removal spells or abilities, Annihilator does not "target." The reminder text says "defending player sacrifices," not "target player sacrifices" or "destroy target permanent." This is a massive advantage for the attacker. Because it doesn't target, Annihilator bypasses keywords like Hexproof, Shroud, and Ward. Even a player with Leyline of Sanctity or a creature with Swiftfoot Boots cannot hide from the hunger of the Eldrazi.

4. Resolving Before Blockers

The Annihilator trigger goes on the stack as soon as attackers are declared. It must resolve before moving to the Declare Blockers step. This means if your opponent was planning to block your 15/15 Emrakul, the Aeons Torn with a small token, they may be forced to sacrifice that very token to the Annihilator 6 trigger first, leaving them with no blockers and taking massive trample damage.

The Psychological and Strategic Impact of Sacrifice

Sacrifice is one of the most potent mechanics in MTG because it circumvents "Indestructible." Since the player is choosing to move the card to the graveyard themselves as a rule requirement, protection spells and shields are useless.

In a typical game of Modern or Commander, the presence of an Annihilator creature creates an immediate "clock." Once an Eldrazi like Ulamog's Crusher hits the board in a Limited or Pauper environment, the game often ends within two swings. Even if the defender manages to kill the creature after the attack is declared, the Annihilator trigger remains on the stack and will still resolve. Killing the creature does not stop the sacrifice.

Analysis of Key Cards with Annihilator

The power of Annihilator is best understood through the cards that wield it. While most creatures with this ability are high-cost Eldrazi, their impact varies significantly.

Emrakul, the Aeons Torn (Annihilator 6)

The "Aeons Torn" is the gold standard for Annihilator. At Annihilator 6, one single attack usually wipes out an opponent's entire board. In competitive formats like Legacy (via Show and Tell) or Modern (via Through the Breach), Emrakul doesn't just win the game; she ends the opponent's ability to play the game entirely.

Ulamog, the Infinite Gyre (Annihilator 4)

Ulamog combines Indestructible with Annihilator 4. This makes him exceptionally difficult to remove. Players often find themselves in a "death spiral" where they sacrifice lands to the trigger, making it impossible to cast the spells needed to exile or tuck Ulamog away.

Kozilek, Butcher of Truth (Annihilator 4)

While Kozilek "only" has Annihilator 4, he provides massive card draw upon casting. Strategically, Kozilek is used to replenish a hand while the Annihilator trigger handles the board. If the opponent sacrifices their creatures to stay alive, Kozilek’s 12/12 body usually finishes the job on the next turn.

It That Betrays: The Ultimate Synergy

While It That Betrays only has Annihilator 2, its secondary ability is what makes it a fan favorite in Commander. It states: "Whenever an opponent sacrifices a nontoken permanent, put that card onto the battlefield under your control." This turns the Annihilator mechanic from a resource-destruction tool into a resource-stealing tool. You don't just destroy their lands and creatures; you take them for yourself.

How to Beat Annihilator: Defensive Strategies

Facing an Eldrazi deck can feel hopeless, but there are several technical and strategic ways to mitigate the damage of Annihilator triggers.

1. Countering the Ability

Standard "Counterspell" cards only target spells. To stop an Annihilator trigger, you need an ability counter. Cards like Stifle, Tale's End, or Disallow can target the Annihilator trigger on the stack and negate it for one turn. While this doesn't remove the creature, it buys you the crucial "Declare Blockers" step to deal with the threat.

2. Going Wide with Tokens

The best way to survive a sacrifice trigger is to have "junk" permanents available. If you are facing Annihilator 2, having a few 0/1 Plant tokens or spare Treasure tokens allows you to satisfy the requirement without losing your lands or key combo pieces. This is why Selesnya (Green-White) token decks often fare better against Eldrazi than "Voltron" decks that rely on a single big creature.

3. Preventing the Attack

Since the ability is "When this creature attacks," the most effective defense is to never let it attack.

  • Tapping effects: Cards like Ensnaring Bridge can prevent large creatures from being declared as attackers.
  • Peace effects: Blazing Archon or Ghostly Prison (though the latter is less effective against Eldrazi with high mana counts) can hinder the attack.
  • Instant speed removal: You must kill the Eldrazi during the Main Phase or the Beginning of Combat step. If you wait until they declare the attack, you will still have to sacrifice permanents even if the creature dies.

4. Sigarda, Host of Herons

In the Commander format, Sigarda, Host of Herons is the ultimate hard-counter to Annihilator. Her text explicitly states: "Spells and abilities your opponents control can't cause you to sacrifice permanents." If you control Sigarda, the Annihilator ability simply does nothing. Your opponent can attack you with a 15/15 Emrakul, but you won't lose a single permanent to the trigger.

Multiple Instances: What Happens if They Stack?

A common question among players is how Annihilator interacts with cards that grant the ability. For example, if you attach Eldrazi Conscription (which grants Annihilator 2) to an Ulamog's Crusher (which already has Annihilator 2), what happens?

According to rule 702.86b, if a creature has multiple instances of Annihilator, each triggers separately. In this scenario, when the creature attacks, two separate "Annihilator 2" triggers go on the stack. The defending player will have to sacrifice two permanents for the first trigger, and then two more for the second trigger. This is functionally the same as Annihilator 4, but they are distinct events on the stack, which can be relevant for cards like Strionic Resonator.

The Two-Headed Giant Interaction

In the Two-Headed Giant (2HG) format, Annihilator works slightly differently. When a creature with Annihilator attacks the opposing team, the controller of the creature chooses one of the defending players as the ability is put on the stack. Only that chosen player has to sacrifice the permanents. You cannot split the sacrifice between the two opponents; one person must bear the full brunt of the Eldrazi's hunger.

Why We Don't See Annihilator Much Anymore

Since its debut in 2010, Annihilator has rarely reappeared in Standard-legal sets. Mark Rosewater, the head designer for MTG, has placed Annihilator very high on the "Storm Scale" (an 8 or 9 out of 10), meaning it is unlikely to return in a major way.

The reason is "player experience." Annihilator is a "snowball" mechanic. If you are already behind, an Annihilator trigger ensures you can never catch up by destroying your mana base. It creates "non-games" where one player effectively stops being able to cast spells. In later Eldrazi-themed sets like Battle for Zendikar, Wizards of the Coast replaced Annihilator with the "Ingest" and "Processor" mechanics, which were perceived as more interactive and less oppressive.

However, for fans of high-power formats, Annihilator returned in Modern Horizons 3, reminding a new generation of players why the Eldrazi are the true cosmic horrors of the Multiverse.

Summary of Key Rule Points

  • Trigger: Happens when attackers are declared.
  • Resolution: Must resolve before blockers are chosen.
  • Selection: The defending player chooses what to sacrifice.
  • Targeting: It does NOT target; it ignores Hexproof/Shroud.
  • Cheat-into-play: If it enters "attacking," it does not trigger.
  • Indestructible: Does not protect against sacrifice.

Frequently Asked Questions (FAQ)

What happens if I sacrifice a Planeswalker being attacked?

If a creature with Annihilator attacks a planeswalker, and the defender chooses to sacrifice that planeswalker to the Annihilator trigger, the creature is still considered "attacking." During the Declare Blockers step, the defender can still block it. If it is not blocked, it deals no combat damage because its original target (the planeswalker) is gone.

Can I sacrifice tokens to Annihilator?

Yes. Tokens are permanents. Sacrificing 0/1 Eldrazi Spawn or 1/1 Soldier tokens is the most common way to mitigate the impact of the ability.

Does Annihilator work in Commander?

Yes, and it is particularly controversial. Many "Social Contracts" in casual Commander discourage the use of heavy Annihilator cards because they can lead to one player being completely removed from the game's resource loop early on.

Is Annihilator the same as "Bane of Bala Ged"?

No. Bane of Bala Ged has a similar ability that triggers on attack, but it forces the player to exile permanents rather than sacrifice them. This is technically not Annihilator, so cards like Sigarda, Host of Herons will not stop Bane of Bala Ged.

Can I sacrifice a permanent that is about to die anyway?

Yes. If you have a creature with a "Sacrifice this: Draw a card" ability, you can't "double dip." If you sacrifice it to draw a card, it's gone and can't be used to satisfy the Annihilator trigger. You must choose permanents that are currently on the battlefield to satisfy the Annihilator requirement as the trigger resolves.

Conclusion

Annihilator remains the definitive "big bad" mechanic of Magic: The Gathering. It perfectly captures the lore of the Eldrazi—beings so massive and alien that their mere presence erodes the very ground (lands) and life (creatures) of the planes they visit. While it can be a frustrating mechanic to play against, understanding its timing and non-targeting nature is the first step toward building a deck that can survive the titans. Whether you are casting an Emrakul to end a game or holding up a Stifle to save your board, Annihilator forces a level of strategic depth that few other keywords can match.