Night Sister

The Night Sisters are a series of DARK monsters that involve seducing their opponents, either the monsters or the players, by making bad things happen when they are destroyed or weakening their foes in certain conditions. They are generally grouped into five categories, each one based off of one of their users in their fanfiction. Nightshade's are Plant-Type and either inflict Burn damage or summon Tokens. Nighthawk's are Winged Beast-Type and they focus on getting out more Night Sisters. Nightcrawler's are Reptile-Type and they weaken their opponent, either by manipulating their stats or negating their effects. Nightingale's are Spellcaster-Type and they focus on manipulating monsters, either with Battle Positions or by changing their controller. Finally, Nightmare's are of the Warrior-Type, and they mow down their opponents with brute force. There are also several Psychic-Type support cards, which Itsu introduces, as well as two Dragon-Type Synchro Monsters, Nightshade Dragon and Blue-Eyes Night Dragon.