Historical Rules · 5 October 2018
Rule 702.48d
Official source text from the 5 October 2018 Rules release
Commander ninjutsu is a variant of the ninjutsu ability that also functions while the card with commander ninjutsu is in the command zone. “Commander ninjutsu [cost]” means “[Cost], Reveal this card from your hand or from the command zone, Return an unblocked attacking creature you control to its owner’s hand: Put this card onto the battlefield tapped and attacking.”