I couldn't finish 'em. Looks like this's gonna get complicated.
Nightblade Puma is an enemy from Final Fantasy XIII-2. It can only be encountered through downloadable content battle called "A Study in Elegant Death". Nabaat summons it along other Nightblade Pumas, PSICOM Wardens, and an Azure Behemoth. It is quite an easy opponent, but if not defeated by the time Nabaat uses Sacrifice Pawn, the Pumas will be sacrificed and the party will be inflicted with Daze.
Nightblade Puma cannot be captured for Paradigm Pack.