Ethersworn Canonist | Magic: The Gathering
Formats Ethersworn Canonist is Legal in
Official Oracle Text for Ethersworn Canonist
Official Rulings for Ethersworn Canonist
10/1/2008 : In other words: Each turn, each player can cast any number of artifact spells plus a maximum of one nonartifact spell.
10/1/2008 : This effect counts all nonartifact spells that are cast, even those that are countered.
10/1/2008 : This effect takes into account spells that were cast earlier in the turn that Ethersworn Canonist entered the battlefield, including any spells 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.