Historical Rules · 10 August 2018
Rule 400.9
Official source text from the 10 August 2018 Rules release
If a face-up object in the command zone is turned face down, it becomes a new object.
Historical Rules · 10 August 2018
Official source text from the 10 August 2018 Rules release
If a face-up object in the command zone is turned face down, it becomes a new object.