Grey Host Reinforcements 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
Flying, wardWhen this creature enters, exile target player's graveyard. Put a number of +1/+1 counters on this creature equal to the number of creature cards exiled this way.
Complete guide
Grey Host Reinforcements is a powerful Spirit Soldier that offers both defensive utility and a significant late-game threat. By clearing out an opponent's resources while growing in size, it serves as an excellent answer to graveyard-based strategies. With its built-in protection and flying, this creature can quickly dominate the battlefield.
What it Does
Grey Host Reinforcements is a 4-mana 1/1 creature with Flying and Ward 3. Its primary impact occurs when it enters the battlefield, as it exiles all cards from a target player's graveyard. Crucially, it gains a +1/+1 counter for every creature card removed from that graveyard during the resolution of the ability.
How it Resolves
When Grey Host Reinforcements enters the battlefield, its triggered ability goes on the stack and you must choose a target player. As the ability resolves, you exile that player's entire graveyard regardless of card type. Finally, you count the number of creature cards that were just moved to the exile zone and place that many +1/+1 counters on Grey Host Reinforcements.
Common Mistakes
A common mistake is forgetting that the exile effect is mandatory for the entire graveyard, but the counters only care about creature cards. Also, keep in mind that Ward 3 is a triggered ability; if an opponent targets Grey Host Reinforcements, they must pay an additional 3 mana or their spell will be countered.
When to Play it
This card is best played when an opponent has several creature cards in their graveyard, such as after a board wipe or a long game of attrition. It is also a vital tool against 'Reanimate' or 'Flashback' strategies, as it removes the targets before your opponent can use them.
Interaction examples
If your opponent has a Solemn Simulacrum in their graveyard, you play Grey Host Reinforcements targeting that player. The graveyard is exiled, and because Solemn Simulacrum is a creature card, Grey Host Reinforcements enters with a +1/+1 counter, becoming a 2/2 flyer.
If you control Roaming Throne with 'Spirit' or 'Soldier' chosen, Grey Host Reinforcements' enter-the-battlefield ability triggers twice. The first ability exiles a player's graveyard and grants counters. The second ability will then try to exile a graveyard; even if that graveyard is now empty, the total number of creature cards exiled across both resolutions will contribute to the creature's final size.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Grey Host Reinforcements
Original English text — Wizards of the Coast / Scryfall
No additional ruling has been published for this card.
Legal formats
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Meta decks with Grey Host Reinforcements
No archived Top 8 deck with this card yet.



Solemn Simulacrum
Roaming Throne