Advanced format ruling
Night Assailant
Card effect (current official text)FLIP: Target 1 monster your opponent controls; destroy that target.
When this card is sent from the hand to the Graveyard: Target 1 Flip Effect Monster in your Graveyard, except this card; return that target to the hand.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.