Historical Rules · 1 June 2020
Rule 601.3
Official source text from the 1 June 2020 Rules release
A player can begin to cast a spell only if a rule or effect allows that player to cast it and no rule or effect prohibits that player from casting it.
Historical Rules · 1 June 2020
Official source text from the 1 June 2020 Rules release
A player can begin to cast a spell only if a rule or effect allows that player to cast it and no rule or effect prohibits that player from casting it.