Advanced format ruling
Neo-Spacian Dark Panther
Card effect (current official text)Once per turn: You can target 1 face-up monster your opponent controls; until the End Phase, this card's name becomes that monster's original name, also replace this effect with that monster's original effects (if any).
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.