Mist-Syndicate Naga is a rare Creature — Snake Ninja card from Jumpstart: Historic Horizons (J21), collector number 218.
Ninjutsu {2}{U} ({2}{U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) Whenever this creature deals combat damage to a player, create a token that's a copy of this creature.