Curse of Exhaustion 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
Enchant player Enchanted player can't cast more than one spell each turn.
Complete guide
Curse of Exhaustion is a powerful white Aura that forces a player to follow a strict 'one spell per turn' limit. This Curse effectively shuts down combo decks and prevents opponents from reacting to your plays with multiple spells. It is a staple for control players looking to slow the game to a manageable pace.
Restricting the Flow of Spells
Curse of Exhaustion attaches directly to a player and imposes a continuous effect that limits their casting capabilities. As long as this enchantment is on the battlefield, the enchanted player is prohibited from casting a second spell during any single turn. This applies to both their own turn and your turns, meaning they cannot cast a creature and follow it up with an instant-speed protection spell.
Retroactive Checking
A critical detail of Curse of Exhaustion is that it checks the entire turn history, not just the time it has been on the battlefield. If a player casts a spell and you then flash in Curse of Exhaustion (using another card's ability), that player is immediately blocked from casting any further spells for the rest of that turn. The game state remembers every spell cast from the moment the turn began.
What Counts as Casting
The Curse only cares about 'casting' spells. It does not stop a player from activating abilities of permanents they already control, nor does it stop them from putting cards directly onto the battlefield via effects. Furthermore, if a spell is countered, it still counts as the one spell that player was allowed to cast for that turn.
When to Deploy the Curse
This card is best played against decks that rely on 'spelling out' or chaining multiple low-cost cards together. By placing this on an opponent early, you force them to choose between developing their board or holding up interaction, as they can no longer do both in a single rotation.
Interaction examples
If you cast Curse of Exhaustion on your turn four, and your opponent has already cast a cheap creature earlier that same turn (perhaps via an effect that gave it flash), they cannot cast a Counterspell to stop your Curse because the Curse checks if they have already cast a spell this turn. Once it resolves, they are stuck with just that one creature for the duration of the turn.
Ghostly PrisonWith both enchantments active, an opponent faces a nightmare scenario. Ghostly Prison forces them to spend mana to attack you, while Curse of Exhaustion prevents them from casting a spell to remove the Prison if they already cast a creature to build their board. They are forced to choose between aggression and utility, but never both.
Smothering TitheWhen you have Smothering Tithe out, opponents are pressured to pay {2} or give you Treasures. Because Curse of Exhaustion prevents them from casting multiple spells, they cannot easily 'dump' their hand to use their mana before your Tithe triggers. They must spend their limited spell-slot for the turn carefully, often leaving them with excess mana that they must decide whether to feed into your Tithe or lose entirely as the turn ends.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Curse of Exhaustion
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
Curse of Exhaustion will look at the entire turn to see if the enchanted player has cast a spell yet that turn, even if Curse of Exhaustion wasn’t on the battlefield when that spell was cast.
No other card is named in this ruling.
Popular combos
Real combos played by the community, sorted by popularity.
Knowledge Pool + Curse of Exhaustion
- 1Whenever the opponent with Curse of Exhaustion attached casts a spell from their hand, Knowledge Pool triggers, exiling that spell.
- 2Because Curse of Exhaustion prevents the opponent from casting more than one spell each turn, the opponent cannot cast the spell permitted by Knowledge Pool, or any other spell that turn.
Legal formats
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Meta decks with Curse of Exhaustion
No archived Top 8 deck with this card yet.