Nagina's

The Nagina's monsters are a series of DARK Reptile-Type monsters. Like the Ape monsters used by in the  anime, the Nagina's monsters tend to have multiple Types, in addition to their original Types, being Reptile. Their trump card is "Nagina, Queen of Sinister Serpents", seeing that it would inflict damage to the opponent based on the number of Reptile-Type monsters in the controller's Graveyard. To support this, some of the Nagina's cards tend to include discarding cards as a cost, which would give the player a chance to fill up their Graveyard with Reptile-Type monsters to activate Nagina, Queen of Sinister Serpents' effect.