Historical Rules · 5 October 2018
Rule 702.36d
Official source text from the 5 October 2018 Rules release
You can’t normally cast a card face down. A morph ability allows you to do so.
Historical Rules · 5 October 2018
Official source text from the 5 October 2018 Rules release
You can’t normally cast a card face down. A morph ability allows you to do so.