Ethersworn Canonist 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
Each player who has cast a nonartifact spell this turn can't cast additional nonartifact spells.
Complete guide
Ethersworn Canonist is a powerful artifact creature that acts as a gatekeeper for the flow of magic. By restricting players to only one nonartifact spell per turn, it forces opponents to play at a much slower pace while favoring artifact-heavy strategies. Understanding the nuances of this restriction is key to maintaining control over the battlefield.
Understanding the Restriction
The ability of Ethersworn Canonist checks the history of the current turn for every player. If a player has already successfully cast a spell that does not have the 'Artifact' type, they are prohibited from casting any more spells that lack that type. It does not matter if the first spell resolved, was countered, or is still currently on the stack; the game tracks that a nonartifact spell was cast.
How it Resolves Step by Step
First, the game checks if a player is attempting to cast a nonartifact spell. Second, it looks back at all spells cast by that player during the current turn. If any of those spells were nonartifact spells, the player is legally unable to begin the casting process for another one. However, players are always free to cast as many artifact spells as they can afford, as Ethersworn Canonist never restricts spells with the 'Artifact' type.
Common Pitfalls
A common mistake is forgetting that Ethersworn Canonist counts spells cast before it even entered the battlefield. If you cast a Sorcery and then play Ethersworn Canonist later that same turn, you have already used your one nonartifact spell limit. Additionally, remember that Ethersworn Canonist does not affect spells already on the stack; it only prevents the act of casting new ones.
When to Play It
This card is most effective in decks that rely heavily on artifact synergy or against 'Storm' and 'Combo' decks that need to cast multiple nonartifact spells in a single turn to win. Since it is an artifact creature itself, it fits perfectly into builds that can bypass its own restriction by playing other artifact-based threats.
Interaction examples
Ornithopter of ParadiseWith Ethersworn Canonist on the battlefield, you can cast Ornithopter of Paradise even if you have already cast a nonartifact spell like a Sorcery this turn. Because Ornithopter of Paradise is an artifact creature, it bypasses the Canonist's restriction entirely.
Esper SentinelIf your opponent attempts to cast a nonartifact spell, Ethersworn Canonist ensures it is the only one they can cast that turn. Simultaneously, Esper Sentinel will trigger, forcing them to pay mana or let you draw a card. Together, these cards make it extremely difficult for opponents to resolve multiple noncreature, nonartifact spells efficiently.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Ethersworn Canonist
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
Each turn, each player can cast any number of artifact spells plus a maximum of one nonartifact spell.
No other card is named in this ruling.
- #2· Wizards of the Coast
Ethersworn Canonist takes into account spells that were cast earlier in the turn before Ethersworn Canonist entered the battlefield, including any spells that are somehow still on the stack. However, any spells on the stack as Ethersworn Canonist enters the battlefield have already been cast by that point, so they're not affected by it.
No other card is named in this ruling.
Popular combos
Real combos played by the community, sorted by popularity.
Erayo, Soratami Ascendant // Erayo's Essence + Ethersworn Canonist
- 1Erayo counters the first spell cast, and Ethersworn Canonist only lets opponent cast one non-artifact spell a turn.
Legal formats
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Meta decks with Ethersworn Canonist
No archived Top 8 deck with this card yet.